I can't seem to find anything like this when searching so.... I'm getting a warning, Soucre: Disk, Event_ID: 51 in my system log (see attached). It referes to a device \Device\Harddisk4\D which I can't identify (see second attacement). Only my C drive is being used for a paging file. I am experiencing periodic re-boots which may or may not be related (the subject error does not seem to corrispond to the reboots) and am working on that problem in the System Error 1003 thread. Anyone have any idea what could be causing these errors (I'd assume a hard drive problem) and what could be done to further check things out. And which drive is the problem? Thanks.