The Ultimate Pop-Up Stopper
1. Insert system boot disk in floppy drive.
2. Restart computer. When prompted select "restart without cd-rom support".
3. At the DOS prompt type "format c: /s" to destroy adware utterly.
4. At the next DOS prompt type restart. This time select "restart with cd-rom support".
5. Insert Windows CD in cd-rom at the next DOS prompt and type "D:", or whatever your cd-rom drive letter is. Then type "setup" and reinstall everything.
(Worked for me.)