sharing files in winnt workstation

Three possibilities:

http://support.microsoft.com/support/kb/articles/Q225/7/82.ASP

http://support.microsoft.com/support/kb/articles/q151/4/27.asp

http://support.microsoft.com/support/kb/articles/q126/4/01.asp

(Sometimes when I cut and paste URL's it looks ok to me but once the answer is posted, an extraneous space will have crept in. Make sure you delete any extraneous spaces or the page won't load).

Reinstall your Service Pack, this has been known to fix that problem.

Bra-k

First, reapply the latest Service Pack. If you still have the problem, navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
in the registry, set PagedPoolSize to 0, and reboot.