Processor

It is like a heart of computer. You must check its efficiency. If you a fast processor which is good for every work, then 2.3 GHz processor would be perfect.

RAM

RAM is related to its dpeed.1GB would be best. If you use window vista, then use 2GB RAM.

Monitor

The size of monitor is depending on you. If you are purchasing a computer for gaming then good contrast screen is best. If you want to only surf internet, then there is no need to think.

Hard Drive

It is related to data storage. Everyone wants to store everything. So always purchase a high capacity hard drive, so that there is no problem for storing anything.100-160GB would be good.

Graphics Card

If you like to play games, then graphics card is very important. The cheap and good graphics card for you is NVIDIA-8600.

Check Documents

Check that documents very carefully, which are come with computer like computer upgrading related information, how to connect cable to computer etc.

Check List

You should take information about these in detailed- Processor type, processor speed, sound and video card, printer, monitor size etc. If you want to use internet then also take information about modem.

These vision problems caused by computer usage may be due to a few facts:

• Sitting on the same position in front of the computer and focusing on the screen for a long time
• Incorrect or inappropriate computer screen's position can contribute to vision problems
• Bad lighting of the surrounding environment of the room and lighting reflection and glare can also be other factors

Have you ever felt occasional eyestrains, sore eyes, headaches or even excessive tearing? These are only few of the symptoms and indications that should prompt your attention more towards your current eye and vision health condition. The easiest way to prevent this problem from getting worse and all-out curbing the problem would most probably is t stay away from computers. Apparently, it is almost impossible for most people who make a living by using the computers for job-related tasks!

Other symptoms that may caused by excessive computer usage:

• red eyes
• trouble changing focus
• tired eyes
• contact lens discomfort that may due to dry eyes
• cyclic momentary blurred near vision
• increase glare sensitivity

Here are10 tips that you can practice to help you with proper eye care:

1. Adjust your seat and the computer that you are working with ergonomically. Take note that the most common viewing distance is between 28-30 inches. Make sure that your body, eyes and computer screen is in a comfortable set up. This is essential in order to avoid awkward head or eye movements.
2. Make sure your workstation is spacious enough so that it could ease your movements. This is to give you more angles to move with the aim of distracting you from becoming too focused to the computer screen and to ease up your body adjustment to get a comfortable position.
3. Get rid of glare from your workstation. Adjust the brightness and contrast on your monitor screen suitable to your surrounding environment lighting. Glare is the common cause of eyestrain and fatigue ness. If you are sitting near the window that is easily penetrated by direct sunlight, perhaps you could try minimizing the source of direct sunlight by putting on a blind or curtain and at the same time lowering the screen's contrast and brightness percentage a little. If the overhead lights are too bright, you can make the move to dim it up a little too.
4. Do not however work with the computer in the dark. You have to make sure there are still lights around and it is preferable that you use a low-wattage bulb and lower down the brightness and contrast percentage of your screen. Another option is to use a monitor glare hood with anti-reflection attributes.
5. Put a limit to your computer usage. Better yet, take a break after every hour of using the computer. You can do so by looking away from the computer to something that is within a short distance view and later slowly shift to somewhere further. Watch more greenery because that could be an eye refresher.
6. Wash your face and blink drips of water on the face into your eyes. By right, the practice helps to cleanse your eyes.
7. Take some time to do eye exercise by moving your eyes left right up and down few times for every few seconds
8. Make the effort to stay healthy. Get use to food that is rich with Vitamin A and C, vegetables, especially broccoli and carrots as well as fruits such as apricots and grapes. In short, you had to have a balanced nutrition for your well-being that is complete with vitamins, carbohydrates, minerals, proteins, fat and sufficient water intake.
9. Eating beta-carotenes-rich foods is always good for maintaining eye health
10. Avoid using contact lenses when working with a PC if possible because contact lenses themselves can cause dry eyes. You can wear contact lenses but it is best to switch when you want to work on your PC or laptop.

These tips however are mere guides. If the vision and eye problems resist, it is advisable for you to consult your physician. Hope these guides help if not much, even a little in your daily life.

This is by far the best advice any security expert can give you. No anti-malware device can offer 100% detection rates. You are the best anti-virus. Always understand what the motive behind advertising free software is: it can be either to advertise a paid version of the product or such, or it can be spyware (serve ads on your PC as means of financing the author). Be wary of free smiley packs, toolbars, antispyware products, etc.

• Understand the EULA - Let's admit it, most of us skip the EULA (license agreement). After all, there can't be malware there. Well, you'll be surprised. Many malware vendors choose to spread their programs using "legitimate" methods, so as to avoid legal trouble - e.g, there is an ad on a certain site, your attention gets caught by the ad - you download the software and install it right away without going over the EULA, only to discover that there are ads popping up on your desktop, and no, they can't be removed through Add/Remove programs. That was written in the EULA… EULAlyzer will help you with this by analyzing key phrases and sentences that talk about possible advertising, limiting of rights, privacy violations and more. It will point you out suspicious sentences, and there's not need to read the EULA itself. EULAlyzer by JavaCool software (Freeware)
• Always GOOGLE before downloading - There is a lot of malware out there, concealing in legitimate software. So, before you download any kind of software: Google it. If the software is legit, there shouldn't be any mention of it on security forums and anti-virus vendors. If there is, don't download and/or install it.
• Watch what you download - Many people download cracks to bypass protection in software and games, and make it "work" as if it were legit. Besides the legal factor, by far this is the most common method of infection. Especially beware of files called crack.exe, keygen.exe, serial.exe and such. Watch what files you download through P2P (Peer To Peer) software.
  • Free antivirus - There are several free solutions on the market. They all are good anti-viruses. Avast! 4 Home Edition (requires free license registration), Avira Anti-Vir Personal , AVG8 Free. Occasionally, you may also want to scan your computer to get a second opinion, using an online scanner that won't interfere with the local anti-virus software, such as Kaspersky Online Scanner.
  • Free anti-spyware - MalwareBytes Anti Malware (MBAM): combines real-time monitoring with excellent detection and removal rates.
  • Free firewall - Comobo Free Firewall: provides excellent protection and is also light on the system. ZoneAlarm Firewall: offers good protection with a large set of tools, but is heavier on the system.

The Holy 3

In this case, the more is NOT the better. If you install multiple anti-virus programs and firewalls, you are guaranteed to get sluggish performance, false positives and lesser detection rates, since each anti-virus program will conflict with the other. Same for the firewall, but not for anti-spyware software - it's OK to install more than one anti-spyware product, but I recommend staying with one. Never download unfamiliar anti-spyware, firewalls or anti-virus software, and if you do - Google it first and find reviews of it. Many of these are considered rogue, and once installed - will detect false positives and nag you to purchase the software using annoying popups.

When Unsure - Scan

If you have downloaded a file, and you suspect it - don't open it. If not triggered by another process or user input, downloaded files will usually remain inactive. Scanning it with your local anti-virus will not give you definite results, and you should scan the file with an online scanner, which uses tens of virus scanners to check the file for known infections (and unknown ones, using heuristics). Two such websites are Jotti s Online Malware Scan and VirusTotal. While nothing can guarantee the safety of a file, scanning the file with one of these online facilities gets close.

If All Hell Breaks Loose - Ask The Experts

There are a lot of volunteer websites online that will help you to remove malware online (even tough ones!) using community-developed tools that are not commercially available or automated, for free. The help is professional and friendly, but remember that the helper's response can take time, depending on the helper's and website's workload. GeeksToGo, BleepingComputer are two such boards which I personally like. There are a lot of others. Be sure only to post in one board, so as not to waste multiple helpers' time. You can find more links to such websites here,

1. Make sure you have enough RAM to handle the programs you want to run. If you are into editing photos or video files, you'll want to have at least 1GB or RAM installed on your computer, while making sure that it is upgradeable should you need more RAM at a later time. If you're a gamer, or are buying a computer for someone who plays a lot of computer games, you might want to get double the recommended amount of Ram that the game says it needs. When the time comes to install more RAM on your PC, see if someone at your IT department at work can help before you go to Bestbuy or Circuit City, as they will overcharge for a simple service that a friend who is slightly tech savvy can accomplish.
2. Be sure to install a full version of an anti virus program after you get the computer home.Many times when you buy a new PC, the company who sold it will only provide a trial version of the anti virus software and charge you to upgrade it when time runs out. There are many free anti virus programs out there but the ones I suggest are AVG anti virus and Avast. Both of these are free to use for home use and are fairly straightforward when it comes to installing them.
3. After setting up your anti virus, your next step should be to get a good anti spyware program. These will protect your computer from nasty pop ups and malicious programs that try to steal your private data. Ad-Aware 2007, and Spybot Search and Destroy are excellent programs that don't cost a cent to have as long as they're used for home use. Installing these programs should be a breeze and shouldn't take more than an hour.
4. Speaking of pop ups, you'll want to browse the internet as unobstructed as possible. For this you'll want to get FireFox installed on your computer. This internet browser is free as well and is continually being updated and cleaned up to make your browsing faster and more secure.
5. Most computers now come with built in graphics which will make general computer use ok. But if you are going to be doing any photo editing or gaming, you'll want to have a pretty decent video car installed. Video card prices continually fall as new models come out, and you can find a pretty powerful card for under $200 if you look hard enough. Nvidia makes excellent graphics cards and anything from the 6800 series and up will serve its purpose just fine.
6. What's the point of having nice graphics if you can't see it? Your monitor should be 17 inches or wider and it should be a flat panel. If you can afford it, get a bigger size because we all know bigger is better.
7. Almost any printer will do for your basic needs. Technology has advanced enough to where you can print high quality photos from photo capable printers so if you want to print them yourself instead of going to the store, consider picking up a printer that is designed for photo printing.
8. VoIP is taking strides and becoming a very reliable way of communicating over the internet, so you'll want to get yourself a decent headset / microphone combo. Plantronics are a very good brand of USB headsets.
9. If you work from home, you might consider downloading Thunderbird. It's an email client developed by the same community that works on FireFox, and has better capabilities than Microsoft's Outlook. You'll be able to set up multiple email accounts and RSS feeds to be read right from Thunderbird, instead of logging in to multiple sites to read them all.
10. Lastly, you'll need some software to type up your documents and spreadsheets with, and for this I recommend Open Office or even Google Documents. It's free to download and comes with all the tools you need to rival Microsoft's office suite. It is also open source, which allows community members to have their hand at fixing code issues and bugs to make the software better and more secure.

So there you have it, free software and all the information you need to know before you buy your next computer. Don't let the sales person lead you on and make you buy software that you don't need, just read through this list and you'll find all the software you need to get by. And don't forget to research your purchase online, as there are many reviews out there for most products.

You can uninstall programs to make your computer have more space and virtual memory. Go to control panel, add or remove programs then remove the programs you don't want.

Cleaning your temporary files

You can get rid of your temporary files to make your computer A LOT faster. 30 minutes of regular internet is about 40 megabytes. Eventually, you can have up to 100 megabytes or even 430 megabytes like I did! To get rid of them, first go to your internet browser, go to options, then internet options, then look for CLEAN TEMPORARY INTERNET FILES. Click that and than wait for it to clean. Then, you can clean the cookies, but if you want to save passwords and usernames then don't clean it.

Cleaning your Registry

Cleaning your registry can have many effects such as getting a faster start up time, and more virtual memory. To do this, I suggest you get a program like Abexo Registry Cleaner to clean your registry. First make a backup with the program so that if something goes critically wrong then you can fix it. It wont take long to fix and wont take long to scan.

Download CCleaner (Crap Cleaner)

This program is very good at cleaning “Crap” and is also a good registry cleaner. Run it weekly and you should be clean of “Crap” and have a faster internet/computer. Get it at ccleaner.com

Buy a new computer

If your computer has less than windows 2000, has a graphics card made before 2004, has less than 550 RAM and has a processor less than 1.5 GHz then you need an upgrade. Yeah, you can check all your statuses if you go to control panel and click system. You can get upgrades at Best Buy or at Circuit City and you can also get it online. Upgrades usually cost from $1 - $200.

1. Voice recognition 

   Voice recognition used to be a separate program that costs £30 (60$) upwards as they are rather complex pieces of programming. Voice recognition can shave hours off work or be used for a little fun. Find it under ease of access on the start menu and start talking to your computer!
   

2. Disable automatic startup programs 

   This is the first thing I do whenever I get a new computer. It can save so much time when starting up your computer by closing a few unnecessary programs. Just go into the start menu and type in "msconfig" this will bring up a box. Click the "startup" tab and deselect any undesirable programs. The more you remove the faster your PC gets! (this isn't just a vista tip, it works on all windows operating systems)
   

3. Windows sidebar 

   How many of you have had that sidebar sat at the side of the screen without adding anything new to it? Here are some really good widgets that I recommend.
   

4. Save battery 

   If you're a laptop user like myself then you'll know how frustrating it is to run out of battery in the middle of something important. This little gadget will help you save those precious minutes of battery by turning off aero whenever your system is low on battery.
   

5. Have a cleanup 

   Vista is packed full of maintenance software such as disk defraggers, virus scanners and firewalls. The majority of the can be found on the start menu > accessories > system tools

1. Get an Antivirus Program

   This is a very important step to take. Viruses such as Trojans and worms can not only slow your computer to a crawl, they can do serious damage to files and even steal information from your computer. Antivirus programs don't have to be expensive, either. As the title of this article indicates, many free programs are available. Download.com has an extensive collection of virus scanners, most of which are free. Downloading one of these programs can keep your computer protected and running faster for quite some time.

2. Get a Spyware Dectector

   Spyware and addware can be loaded onto your computer from almost any web site on the Internet. What's more, more often than not you won't even know it's been installed. Like a virus, these programs can wreak havoc with your computer and even steal information, so getting one of these programs is essential to having a healthy computer. Again, free software is readily available on the Internet.

3. Defrag Your Hard Drive

   Ever once in a while, defragmenting your hard drive can really help speed up your computer. Defragging is a simple process that involves your computer moving files around to allow itself to run faster. The program is a part of Windows and can be found under the AccessoriesSystem Tools menu. Defragging once every month or so can increase your computer's speed by a large amount.

4. Keep Tabs on Your Hard Drive Space

   Hard drive space can disappear very quickly. As it does, your computer will run slower. This problem is easy to avoid; simply check to see how much space you have left on occasion. To monitor your drives more in-depth, a program such as FileAnt can give you a complete breakdown of where your hard drive space is going and can help you identify things tat can be removed to save space.

5. Clean Up Your Hard Drive

   Also a Windows program, the Clean Up feature checks your hard drive and finds information that is not necessary to keep, such as temporary internet files, deleted items in the Recycle Bin, and so forth. Usually the space saved here is minimal, but even small amounts can help speed your computer back up.

6. Avoid Double Saving

   Double saving is rarely intentional, but sometimes duplicates of files end up in places you wouldn't think to look for them. Unless you wanted to create a backup of a file, these files take up space and slow down your computer. Using the Search feature can help you find places where Windows creates a backup that isn't needed.

7. Get a Popup Blocker

   Popups on the Internet are usually harmless but they take time and memory to load. They are annoying, they slow down your computer, and they can be avoided. Free programs are available to block popups, and some Internet browsers such as Firefox have built-in popup blockers and add blockers for a faster, more enjoyable Internet experience.

These are just a few tips, but following them will keep your computer running faster and more effectively for as long as you follow them.

6. Download The Operative System's Actualizations

It is substantial, to get your protection to the maximum against eventual virus attacks, to download this actualizations; because what most worm Trojans seek are commonly found “security holes” in most Microsoft products. For these, the company constantly offers “critical” actualizations which we can download, and for those who are a bit lazy to look for them in the internet, Windows has an option for them to download automatically.

7. Be Careful With The Files You Receive In Your e-Mail

When we receive a new mail, it is highly recommended to virus scan it, even if you know the remittent. Most users do not even know that their computers are infected, and may be sending you a corrupted file by accident.

8. Another Entrance Gateway, Chat

In most chat rooms it's really common to send any kind of files, via a DDC system. If you get one you never requested, or from an unknown source, NEVER accept it, even if it seems really interesting.

9. Other Tips

Pay special attention to archives which may grow in size without any apparent reason. Or if you get strange Windows notes. Try not to download stuff from web pages you may consider unsafe.

10. And Of Course, Update Your Antivirus

Nowadays there are quite good either free or paid antivirus. In both cases they update automatically, so we all have the parches for the dangerous Mydoom y mentioned in the first part of the article.

If you haven't read the first part, brush up on tips one to five.

And publish 10 obvious but really important tips that everyone with a computer must follow. So if you haven't been infected yet, you should read the next:

1. Be Careful With VBS Archives

   Do not open files with the extension VBS (Visual Basic Script, a language which permits to execute routines in the PC) unless you are completely sure that that mail comes from a trustable person, who doesn't want to harm your computer.

2. Do Not Hide Program Extensions

   All Windows operative systems hide commonly known program extensions in windows explorer. This characteristic can be used by virus designers and hakers to hide a program as if it were one with a different extension.

3. Change Windows Explorer Security Form “Minimum” to “Medium”

   To change this you must go to “Tools”, “Internet Options”, and “Security”. After that you may choose the one you like. I recommend using the option to personalize and set it to mid or high, depending on the risk to which you consider you may stand up to.

4. Install a Good Firewall

   This is really important. You may download a free one from the internet, or just configure the one from your operative system (better if you have windows XP).

5. Make Security Copies

   A way is to upload most important archives to internet. There are web pages such as Rapidshare, Megaupload, or File Factory to which you may upload important stuff. In this way you may clear your hard disk without loosing info. Of course there are other ways, such as making backup copies in CDs, DVDs, ZIP drives or pen drives.

Here I will outline a few simple, free and easy-to-use programs that will help counteract this deterioration.

1. Defragment your hard-drive. It is said time and time again, and for good reason. Defragmenting your hard-drive will drastically improve your pc's speed. Defragmenting your hard-drive puts all your data back together, merging all the bits of each file scattered across the disk back together again. You don't even need to install an external program to do this. Go to >My Computer >Right-Click on your hard-drive (s) >management >defragment. This will take anywhere between 1 to 3 hours to complete, depending on the capacity of your hard-disk but is well worth the wait.
2. Download, and install "free registry defrag." This is a two-click use program. Once installed, run, and then select "analyze your registry." After two or three minutes, it will advise you as to what action to take, either that your registry is fine, and does not need defragging, or that it does. If it does, select the second button to compact your registry. By closing the various holes, and removing redundant data, your pc will be able to move through the registry faster, and consequently BE faster.
3. Download and install "Reg Cleaner." This allows you a greater level of control over how you deal with redundant data in the registry, and allows you to see exactly what programs have entries in your registry. Clean out any entries for programs that no longer exist on your system. You can either do this manually, or use a built in search function.
4. Reduce the number of programs that load up at system start-up. Use Spybot SnD to examine what programs are starting with your system. Clean out as many as possible for a faster boot time. It is advised to leave anti-virus and firewall software free to boot up at system start-up, otherwise you can expose your system to malicious programs and scripts.
5. Consider overclocking your system. If you are using an NForce system, try using NTune, otherwise look on the web. There are many applications which can do this safely and automatically, although some computers cannot be overclocked.