It is not a gud idea to download any anti-spyware software before you know it very well. Coz anit-spyware software itself put lot of spyware of themself.If anyone runs into this kind of problem best way is to clean all the temp files as soon as possible and do a System Restore... if it didnot work then u can try using gud anti Spyware software.....

Process of System Restore is go to  Accessories  then to System tools and System Restore..

Follow the instructions after that...

Always try to setup the Browser Security system... if you are prompt with something like do u want to use this Active X Control etc while visiting any site makes sure u are going to the right Cites otherwise you will get screw up.... Gud luck

GIANT AntiSpyware   This is the Microsoft Product... try this if it works if not some more are as follows