I've got a PC with 3 users. It was pretty infected. It's since been totally cleaned. I did scans with Avast, AVG, Spybot, Adaware, A-Squared, Smitfraudfix, Combofix, Malware Bytes, and Hijackthis. Fully clean now. I think it was after combofix, but I may be mistaken, explorer shell wouldn't run when logging into windows. When I click on any user to login, their background comes up, but no desktop icons, start bar, or such. I have to ctrl-alt-del and use task manager to run explorer.exe, then everything pops up. I've tried: 1) Re-running combofix to see if it would fix itself 2) checking: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] "shell" is set to: explorer.exe 3) using the startup "Run" and "RunServices" (ie: msconfig entries) to call a batch file to run explorer.exe. It calls explorer perfect, but those don't run till I run explorer manually, so it just opens the My Documents windows explorer window. 4) using group policy to set a logon script of a batch file to call explorer.exe, same as #3. 5) Windows XP Repair Install Any more ideas/help? Thanks!