Hi, first-time poster here! I asked around an unrelated forum for a tech-support site, and they referred me to this place.
Here's my issue. I am running Windows XP Home Edition (Service Pack 2) on an AMD Athlon XP 2000, with 1.68 GHz and 768 MB RAM.
Starting a few months ago, my computer would occasionally reboot itself. But recently this started happening more frequently. Now I can barely keep the computer turned on... in fact I'm anticipating several random reboots before I successfully make this forum post.
Sometimes the computer will reboot DURING the boot process. Oftentimes it will reboot in a loop, several times, before successfully starting Windows.
Once in Windows, it seems like any given action can trigger a Blue Screen Of Death (which flashes by too quickly to read) and the computer reboots again. The BSOD's are pretty erratic. Sometimes I'll be using the computer for a half hour without any problems. Other times I'm barely on for a minute.
Things I've tried so far:
- reinstalled Windows XP
- formatted C: drive (I have a secondary drive that I use for storage, but the operating system and some other key programs are on C

- downloaded and installed the newest driver for my NVIDIA graphics card
- tried each of my three RAM sticks one at a time
I figure there are still too many variables to recommend a real "solution" at this point, but what are some ways for me to better diagnose the problem? If anyone could point me in the direction of some good diagnostic programs, or show me how to post error logs in this thread, I'd appreciate it!
Or if you just have any wild (or perhaps not so wild) theories as to why my computer might be constantly resetting itself, feel free to share those too!