My fairly new netbook (3 months old) regularly reboots mid-use, typically every few hours (not in any obvious pattern, just on average). Usually a 1000000a Stop error is displayed, although I have seen others including 00000005, 1000007e & 1000007f.
I have minimal software installed - Microsoft Security Essentials, ZoneAlarm are about the only things I have installed, and I usually have Firefox portable running from a usb drive within an encrypted TrueCrypt volume. I have had a look in EventViewer, and along with the System Errors which correspond with the BSOD / reboots, there are fairly regular "Service Control Manager" errors which come in pairs and relate to ZoneAlarm - the first says
"Timeout (30000 milliseconds) waiting for the TrueVector Internet Monitor service to connect."
and the second, recorded at the same time, says
"The TrueVector Internet Monitor service failed to start due to the following error:
The service did not respond to the start or control request in a timely fashion. "
I'm not sure if this is normal or completely unrelated - again, there seems to be no obvious correlation between the time of these errors and the BSODs, but I thought it was worth mentioning anyway.
Any help that anyone can give on the possible source of this problem would be greatly appreciated.