“Windows NT 4.0 users who have been wary of Service Pack 4 (SP4)
had better get used to it, because their systems will not be
completely year-2000-compliant without it.”
“Microsoft now is recommending that NT 4.0 users implement SP4
to achieve year-2000 compliance — a shift from the company’s
previous position that Service Pack 3 (SP3) would do the job,
albeit leaving minor year-2000 issues.”
There also exists a reader poll within this story, asking if you
use Windows NT.