Unkown Hard Error: ntdll.dll

[Jannemann 0]

If I restart Win 2k, the Blue Window appears and it's show this massage:

Stop: C0000221 Unkown Hard Error

\Sytem Root\Sytem32\ntdll.dll

 

What can I do?? Please help me

[hammer_2000 0]

Have Rescue disk? Use it!

Otherwise start installing Win2000

again using the "Repair" Option during

Setup. Works fine and no data will be

lost!

[Jannemann 0]

I've reinstall windows with the repair option but it doesent work! than i have formated my Harddisk and install Windows again!but this Error apears every time!

 

any other iedeas?