Now on to the issues:
Every 5-7 days, my computer, a custom build I did in Oct 2008, will stop while on whatever random internet page I happen to be on. The status in the bottom left corner says "Done", but it won't allow me to refresh, go to another page/bookmark, etc. If I try to go to another page, i will eventually give me the usual Firefox page present when a connection can't be made (eg. It has 3 tips on what the problem might be, along with an option to Try Again, which does nothing). Checking out the network settings in the Control Panel and trying to repair the connection doesn't help. I seem to be able to still run applications, navigate through Windows Explorer, and do pretty much anything not related to internet.
Logging off and back on doesn't remedy the issue, but restarting does. The problem is that, when I restart, the PC only gets as far as the MoBo splash page and reboots endlessly. It doesn't allow me to get into the BIOS, and never makes it past this splash page. I've thoroughly cleaned all dust from the components and case, and I've checked my RAM and PSU voltages to make sure everything's normal, but the only thing that seems to bring it back is to unseat and re-seat a RAM stick. 9 of 10 times, it will then boot properly and all is well with the internet again. Windows will tell me that a "serious error" occurred and log a minidump in the usual folder, and everything runs smoothly again for 5-7 days. I also defrag regularly. AVG is not detecting any viruses.
My last 2 ideas are 1) to try running with only one stick of a matched pair of RAM I use to see if one of them is the culprit, and 2) re-format.
For reference, I'm running:
Windows XP Home 32-bit w/SP3
4GB Mushkin RAM
Palit Radeon 4850 512MB
2 x WD 500GB HD
Core 2 Duo E8400
Antec 650W PSU
Gigabyte EP45-DS3L MoBo
Please let me know if I can provide more info or post a minidump if it will help, and thanks once again for any assistance.
Edited by FrackinToaster, 22 November 2010 - 10:13 AM.