Windows Live OneCare safety scanner is a free service designed to help ensure the health of your PC.
Check for and remove viruses
Get rid of junk on your hard disk
Improve your PC's performance
How safe is your PC?
Use our free protection scan to check for and remove viruses, spyware, and other potentially unwanted software and to find vulnerabilities in your Internet connection.
Got junk cluttering up your PC?
Use our free clean up scan to find and get rid of unwanted stuff on your computer that might be slowing it down.
Is your PC running at its best?
Use our free tune up scan to see if you should defragment your hard disk to help improve performance, and then let us do it for you.