Recover from serious malware

Two days ago i noticed that my pc was getting slower and slower.
I thought that i put too many apps installed and running together causing
crushes.....
But soon enough i realized that my pc was seek. While i was surfing the pages redirected in a new page unknown to me (A GREEK ONE) telling me that it was doing an online scan and before i even read the page it tried to scan and install something.......
Norton Internet Security was useless.....
I was scanning and scanning to find the problem but ... nothing. Everything was O.K.
.....
A....although i use opera and Firefox the new window opened in IE...and i hate Internet explorer....The system was useless....My quad core was like a Pentium 3....

Then i called Andonakis the guru of Pc's.
He told me "Cousin why you use Norton when u can use

Kaspersky Internet Security 7.0.1.325 "

I did not have anything to loose. I got Kaspersky and in 30 min my Pc was as good as new....
It found 5 Threats......Wow....

I' ve never used K.... before but now i m a Huge Fan.....

Useful Links:

Try it http://www.kaspersky.com/

http://www.kaspersky.com/virusscanner

http://en.wikipedia.org/wiki/Malware