PC CARE 2

The software mentioned in our list are totally Free

Windows Defender- Free antivirus for Windows vista,XP,200,NT

Windows Defender offers three ways to help keep spyware and other potentially unwanted software from infecting your computer:

• Real-time protection. Windows Defender alerts you when spyware or potentially unwanted software attempts to install itself or run on your computer. It also alerts you when programs attempt to change important Windows settings.
• SpyNet community. The online Microsoft SpyNet community helps you see how other people respond to software that has not yet been classified for risks. Seeing if other members of the community allow software can help you choose whether to allow it on your computer. In turn, if you participate, your choices are added to the community ratings to help other people choose what to do.
• Scanning options. You can use Windows Defender to scan for spyware and other potentially unwanted software that might be installed on your computer, to schedule scans on a regular basis, and to automatically remove any malicious software that is detected during a scan

CCleaner -cleans traces of your online activities such as your Internet history ,Temporary internet files

CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history TEMPORARY INTERNET FILES. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! :