My laptop shuts down.
It happened several times so far, and there is a pattern; after I leave it for an hour or so, power saving activates, and then I start using it again for 10 - 15 minutes when it shuts down with no prior warning.
I'm pretty sure that it's not an overheating issue, because I keep it in a fairly cold room, and the laptop is not hot at all after shutting down (it can get much warmer, without shutting down).
I use Windows 7 so that could be the problem, because I never had this problem while using Windows XP. The laptop is an Acer Aspire.
Do you know if there are some settings in Win 7 that can be changed to stop this?