I am a computer tech in New Zealand, reasonably used to removing viruses, but I have struck a particular one which has me baffled.
On XP Home I removed Instant Access and the following viruses (Housecall names): troj_wintrim.a; troj_wintrim.aw; troj_nex.b; worm_dandi.a; joke_train.a; worm_sdbot.rs; troj_dialer.sa
However when I tried to install AVG, AdAware and Spybot only Spybot would install and run. AVG and AdAware would not even execute from the installation files (and I have done so from the same files before and since - I carry them around on my CD and flash drive). Even more bizarre is that when I reboot and go back to the files to try again, they have been deleted - even from a flash drive!
I have done a repair of the XP files (restore over the top of itself) and put in SP2, to no avail.
The customer is 30 miles away and doesn't want me to take the computer away, so it would assist me greatly if someone could simply identify the virus,rather than suggest small tweaks.. any ideas?