malware removal

1. my hp pc is 6 months old, and OS is Vista
2. i have an annoying abebot virus notification that keeps popping up telling me it's a security warning and redirects itself to web page of pc-cleaner of some kind.
3. i have updated all programs and i scanned pc with norton & ad-aware , both purchased, in normal AND safe modes; with avg , spyware doctor and spybot - both modes also - and ALL OF THEM tell me full scans were ran and there are no infections
4. stopzilla and other software that only scan for free, show many threats and infections but how many can i keep buying?
6.i cleaned and defrag'ed
5.BOTTOM LINE IS THAT POP-UP's are STILL popping up PLUS now i have other problems:
a. desktop background is all black screen now and will NOT load any vista picture, eventhou it shows picture in control panel browse window
b. ALL windows with pictures in it will NOT display picture UNLESS i go to "view" and then it will show it; initially shows only tags


WHAT ELSE CAN I DO?? please help

Lillian