Paul, I was plauged with this (still am in fact) for a long time before I was able to pin down the source of the problem. I leave my PC on all the time and a few months ago I started realizing that the PC had re-booted while I wasn't around. I tested everything I could, cleaned things up, took everything out of startup, made sure nothing was running when I left the PC, and none of that seemed to stop the occassional re-boot. I was unable to determine any kind of pattern. Then one Saturday when I was at home and working on the PC, it suddenly dropped out on me and rebooted. I also noticed that all the lights in my house flickered as well. It was only about a half second, but it was enough to cause the PC to re-boot. Once I started noticing this, I would go and check my pc everytime I saw the lights flicker and sure enough the pc was rebooting. I don't have critical things on this pc so I have not gone out to get a UPC device. I don't know if your problem is the same or not, but it certainly could be caused by a power fluctuation. A UPC device should cure that if it is. Spider Largo, Florida 33771 http://web.tampabay.rr.com/spider1 -----Original Message----- From: 24hoursupport-bounce@xxxxxxxxxxxxx [mailto:24hoursupport-bounce@xxxxxxxxxxxxx] On Behalf Of Paul M. King Sent: Friday, June 28, 2002 11:54 PM To: 24hoursupport@xxxxxxxxxxxxx Subject: [24hoursupport] Mysterious rebooting Lately, I have been returning to my computer after a couple of hours or more to find it has rebooted in my absence. I know this because the Zone Alarm and Clip Mate screens are visible and they are set to open whenever I reboot deliberately. I defrag and run a maintenance program each Friday night. And I may purge my temp and internet files oftener if they need it. I have noticed no other aberrations when operating my PC. I use WIN98 SE on a three year old Compaq Presario 5030. My HD is presently less than 50% filled. What advice do you have for the possible causes of my problem and how to fix it? Paul King - Users can unsubscribe from this list by sending email to 24hoursupport-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field OR by logging into the Web interface at http://web.tampabay.rr.com/spider1/24hrsupport.htm. - Users can unsubscribe from this list by sending email to 24hoursupport-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field OR by logging into the Web interface at http://web.tampabay.rr.com/spider1/24hrsupport.htm.