This is a really vexing issue for me.
I have a machine with Windows XP Pro SP2 that was an OEM install and has worked perfectly well for the past year (or so) since we got it. I have a WSUS server set up and it hands out updates to my machines very happily. About a month ago there was a pending reboot on this particular machine from several WSUS updates -- the machine does not get used very often because it has specialized .NET software and hardware on and has one particular purpose so I don't know exactly which patch might have caused the problem but I definitely feel it is related. I rebooted the machine and I was not able to login again.
When I try to login as any user, network or local or even in safe mode, it takes the user name and password, starts to load settings then zaps to logging off and back to the login box.
I've been working on this on and off for a few weeks, it's now become an urgent issue to fix and I can't blow the machine away, I need to software and settings that are on it:
Here are the steps I've tried thus far:
Safe Mode - Same Behavior
Boot from Last Good Config - Same Behavior
Boot from CD into recovery console, copied userinit.exe and wsaupdate.exe to machine (as suggested by a few websites I've seen).
Any help would absolutely appreciated!