Uptime (Windows 1.0 i286) 10 years, 2 months, 3 weeks, 5 days, 7 hours, 34 minutes, 19 seconds. :Q
seriously though.. I had an NT 4.0 Server machine (a P66 - yes, 66 not 166) 40mb ram up for ~6 months before my dad accidentily flipped the wall switch off, and I realized the hard way my box was plugged into one of "those" sockets. :Q
check out uptimes.net btw