Just now I tried to start Windows Explorer. I clicked the shortcut about a minute ago. Then again, and one more time. None of these have appeared yet. This is an extreme. It happens quite often that it take a while before Explorer starts up. It is very annoying. Sometimes the taskbar doesn't respond, or a window goes blank.
I'm on a Windows 2003 Active Directory. I don't believe other people here have problems this bad.
I have no idea where the problem lies, my computer, network card, problematic server shares on the network. What can I try to solve this? Are there tools to locate the cause?
Update: I just tried another computer here, and Explorer fired up immediately. Here none of the four (!) instances have appeared, and it's minutes later.