Advanced Windows Care is an excellent software and free for personal use. It can Scan and Remove Spywares, Prevent Spyware from installing on your PC, Search and Fix Registry entries and values, Optimize your system, Control and Optimize Startup items, Erase your Surfing traces and Clean up Junk files from hard disk. Additional Tools like memory optimizer, startup manager and disk manager are also provided.
Antivirus = Bloatware. This is the equation which most of us have in mind. After all, these softwares are biggest memory consumers. But have you ever heared of light antivirus. If not, this is the one and that too free. It is pretty fast and consumes very less memory. It provides all round protection from viruses. It is perhaps the only antivirus with support for skins. Yes, you read it right, you can easily skin it. And by skins, I do not mean the just changing colors like some other softwares, the skins change whole the interface. Just see the screenshots above, they show the skinability of Avast! First one is Avast's Default interface and second is a Skin Downloaded from avast.com.
Advanced Windows Care will automatically fix registry issues for you but what if you are left with a nasty installer? Many times, uninstalling a program does not remove all the data from registry and you are left with the program still showing up in the Add/Remove Programs. CCleaner can help you at such times. It can Run Uninstallers, Rename Entry and Remove junk Entries. Additionally, it can clear you history, optimize registry and manage Startup Items.
PC slowness is mostly caused due to fragmentation. You have to manually defrag the drives using Windows Defrag and this takes too much time. It would be nice if you had a software that could automatically defrag your hard disk! So, here is IOBit Smart Defrag. It is free or personal use and automatically defrags your hard disk when the computer is idle. Manual defrag is also available and you can schedule a defrag. It is an install and forget solution to end your problems.