I reboot my box that I use quite often (every 2-3 days normally)... however, we have a Win2k box sitting in the corner playing gateway (sharing with 4 computers using ICS) that's been up 25 days as of now... and was up something like 90 days before we added RAM and obviously had to reboot. It's an old P2-350 with 256 MB RAM, a motherboard of unknown brand, and an S3 Virge Gx2 AGP video card. doesn't even have a monitor connected. 5 GB 5400 rpm WD HD. Part was given to us, the rest is spare parts.