Here's what I've found so far.
I ran Panda online scan. It found Virus:Trj\Briss.A in C:\Windows\DownloadedProgramFiles\jao.dll which it removed.
I went to Symantec and followed manual removal for Purity. The only thing on the computer anywhere that is listed on the Symantec fix page was HKLM/Software/Clickspring,which I deleted.
I went back to AVG virus vault and had it restore the msimn.exe and wmplayer.exe to see what would happen.
Clicking on either program to execute brings up AVG access denial-reason given- the file in infected with Trojan Horse Downloader Nex.B
I don't know what to do next.
Win98SE with AVGFree and all updates.
I don't know all the details, because my husband did not write them down/can't remember. What I know so far is this: Last night he was browsing the web. AVG pops up something, he thinks it said Purity trojan horse downloader. He told AVG to heal it. Then it popped up again, and he clicked Heal. Then the third time it said something in C:\Windows\System\KFDKUD.EXE it could not heal. So he went to that directory and deleted that file. Then AVG reported it again in that location, and he deleted it again.
Right now AVG virus vault shows C:\Windows\ProgramFiles\mismn.exe and wmplayer.exe as healed files and the 2 KFDKUD.EXE as deleted files. Outlook Express and Windows Media Player will not open, the executable is missing. These are the 2 files listed as healed in the virus vault.
What do I do in order to fix it and not mess things up further. Any more info needed, just ask and I will go to his computer and try to find out.