One of our traders has a W2k Pro machine with SP4. Something (unfortunately, the desktop support guys are extremely vague about what) has been installed on his machine and now explrer.exe keeps crashing with messages like the following (the memory addresses change everytime).
Windows - Application Error The instruction at "0x00403759" referenced memory at "0x202c7971". The memory could not be read. Click on OK to terminate the program.
After clicking OK, the entire explorer shell restarts which causes the message to pop up again.
The strange thing is, if the machine is rebooted, anyone can log on once and the PC is fine. However, as soon as a logoff has taken place, the next person to log in receives these errors (even if it's the same account). This occurs to all accounts including administrator. We've deleted the user profiles to ensure it isn't profile related. We've also re-installed SP4.
The following error appeared once in the event viewer. Event ID 1000, Event Source: UserEnv 'Windows cannot unload your registry class file". There is a KB article (KB827825) that references this error, but i'm not sure it applies to this problem.
We've currently told the trader not to log off his machine, and it is working OK, but any suggestions for fixes would be greatly appreciated.