Hi My pc was sick after years of using p2p softwares ... without real antivirus and antispywares.
I downloaded recently CWShredder, Spybot and ad-Aware (3 antispywares). These softwares are excellent and free. I recommand them to u all.
HijackThis can also help, particularly against the unwanted searchbars. But be prudent with that last one, it doesn't makes the difference between good and bad files, You have to make the choice ...

Ugh! If you are were using Windows all that time then you either are incredibly brave or incredibly, um, uninformed.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-