I'm joining this thread as I have the same problem as Lenzman.
I have done everything you suggested. Finally, at the end of nearly an hour of scanning in Safe Mode, the SUPER came up with absolutely nothing.
To put you in the picture, a week ago a big red message suddenly appeared on the screen advising that, a virus had been detected and to 'click' immediately to stop it. My wife did just that. I have since spent hours and hours trying to remove it. But no matter what you cancel, the next time you log on (or go on line) all the advertising and pop-ups re-appear. The virus warning is just a picture which hijacks the desktop wallpaper program. You can't change it unless you delete it in WINDOWS/system32. But it still comes back again. Eventually, I started cancelling any file that appeared at the same time as the program got downloaded (which unfortunately cancelled my XP registration too!). But at least that seems to have got rid of the pop ups at last.
However, every half hour or so, my AVG opens a warning window advising multiple viruses found. When you try to delete them, some go, but one always comes up with 'cannot find the file'. Thats the file that ends in bacon.exe. Strange, because a search of my computer cant find that file either. The files that it does delete usually end in a three digit number.exe. But a different three number .exe comes up each time the warning re-appears.
Got any further ideas? Especially as to why my AVG thinks that, a non-existent file (that it cannot heal because it knows it's non-existent) has become infected with Trojan Horse.
Edited by Vic East, 12 July 2009 - 05:33 PM.