Unable to login to XP

[Sully]

I have a computer at work that I'm not able to logon to when it's booted up with the network cable attached. If I unplug the network cable, boot up the pc, I can log in.

These are the two messages that I get when I try to login:

The system cannot log you on due to the following error:

Invalid access to memory location

and

The system could not log you on. The server authenticating you reported an error (0xC00000BB).


What the heck is causing this? How do I fix it?

Last resort is to reload XP, but a user has a lot of stuff on here that I can't lose.

[Mike]

So with the network cable unplugged it'll log in without errors? Is this a member of a domain?

[blooksoll]

1, his wife: "Pharaoh's wife next door, moody, grumpy enough, Pharaoh how to get along with her?"
Husband: "Do not you know Pharaoh is in the city's Bureau of Meteorology."

2 Husband: I want to buy a motor vehicle.
Wife: They say the car is another man's wife, you are guilty of bigamy on a car.
Husband: that the car registered in your name, I just can occasionally use on the line.
Wife: You want honest mistresses?
pandora bracelets
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[Steve Jobs]

You just need network access to log in to your PC. If you are connecting you PC to the network cable than your PC needs Network log in.