Windows NT Server 4.0 Date/Time Change

I have noticed that over the last two days my NT4/SP4 w/Y2K hotfixes servers have been changing the date and time without warning. At around midday today one of my servers changed dates to November 16, 2000 with a time of 10:09 P.M. Quite a few ofmy users were locked out and logged off as a result.

I’m thinking it has something to do with Service Pack 4.

Any suggestions?