DAS wrote:
Well indeed. That's just one of the virus scanners I'm using that keeps warning me about the virus, goes through the process of deleting the offending files - but the virus crops/cropped up again when the PC is rebooted. Hence why this is a particularly nasty virus.
Fire up Msconfig (Start --> Run, type in msconfig and press enter). On startup tab, look for anything with some obscure name. If this "thing" returns after a reboot, it must be being loaded at startup and locking this unremovable bookmark, so Windows can't remove it as it's probably in use.
Decent proggies will at least have some ounce of familiarity to their startup names and paths when looking through msconfig. For example, AVG fires up avgcc32.exe but, assuming default folder installation, it's obvious where it is and what it's for (unless you deliberately like to be awkward

). Take note of anything that loads from Windows or Windows\System (or Windows\System32), especially if it's not an executable file.
You don't state your OS but from your brower buttons, I'm assuming XP? In which case expect to see "dumprep" in the startup list and, if Nero Express is installed, Nerocheck, from system32, to be loaded as well.