Maybe it's a hard-disk fault, but I don't think so. Ran some tests and all says the HDD is in green condition, all test passed. Memory is a Geil ULTRA, guess that's not a problem either.
Basically if I run uTorrent about ~80mbps speed (thats my home connection atm), it'll restart the PC. I don't know how, or why. In the log it says "The PC has been rebooted to check for errors. .... The memory dump have been saved into the following file."
The error message in hungarian (since its a hungarian XP):
Az operációs rendszer hibakeresés céljából újraindította a számítógépet. A művelet a következő volt: 0x100000d1 (0x0000002c, 0x00000002, 0x00000001, 0xa94a9a8c). A memóriakép mentve a következő fájlba: C:\WINDOWS\Minidump\Mini092210-07.dmp.
The mainboard is an Intel GCLF945. HDD is a Seagate 320gb Sata2.
XP SP3 + Avast! Home.
I can provide the mini-dumps if you need em.
uTorrent version: 2.0.4