In the late 90's, I administered the software test lab including UNIX workstations and Windows beige boxes I had build in addition to some servers, the LAN, and WAN for a nuclear engineering consultancy. There were a few Windows 95/98 boxes that were imaged for testing and contained 4 handy-dandy clones that could be copied (prior to widespread usage of Ghost). It would regularly stay running for a month at a time when disused, but I believed it was set to simply reboot to the first primary partition on BSOD. I bet at least one of event logs probably contained entries like these because centralized syslog/log shipping and monitoring weren't set up.