I was looking at the things you were TELLING me about the PPV 2007 and 2003 when all of a sudden this THING popped up on my screen and said it was System Tools, all these viruses and Trojans had invaded my computer, scan now, pay $29.95 ONE time charge and my desktop is black, it wouldn't let me do anything but turn it off. I restarted in safe mode, it was still there, every time I tried to do anything, it wouldn't allow Windows to open, frantically trying to get RID of it, I have F-Secure (don't like it but my computer dude insists it's the best-he's going to hear from me!) and now am running a virus scan because all of a sudden that "Security Tool" has vanished except for the fact that my desktop is black, no ICONS whatsoever. I'm afraid to cut off the computer for fear it will come back.  This has never happened before.  I don't know what to do. All these windows kept popping up on my screen telling me I was running my computer unprotected, did I want to continue, when I said yes, it still kept popping windows up at me asking me.  Am I being attacked?  It had icons on my taskbar at the bottom and now all of a sudden they are gone, however, desktop and icons are not there.
Go to the malware section of this forum and follow the instructions at the top of that page.