odd laptop behavior

I leave my laptop turned on at night sometimes to download stuff, but when I wake up, it'll be turned off or maybe it's in hibernate mode. I think I have the latest updates to windows so that should stop the worm that's been going around right?
also if it's not turned off, then it'll be going into hibernate or standby mode, i'm not sure which one, but when I move the mouse it'll try to start back up and then gets stuck.
my laptop setting have been changed to always on so it shouldnt' hibernate or standby on its own right?
have anyone else experienced this problem before?
any help would be appreciated. thanks!

You have to change the power settings to never turn off.

"Always on" affects CPU throttling, now power schemes.

right click a open area of your desktop, select properties, then click the screensaver tab, click the power tab. now where it says turn off hard disk, monitor, ect... select never, apply, now click the hibernate tab, take the check out of hibernate.
if you dont have alot of ram and the system tries to come out of standby or hibernation it will freeze. might want to run a spyware check to make sure you dont have any of that slurpin up your resources. can use spybot, adaware,.....

great! I think that solved the problem.
I'm running xp with 256MB of ram...not too surprised it would lock up. probably going to upgrade soon.

Thanks for the help!

hmm....well I thought it was working pretty good since I changed the power settings, but then last night it just went to standby for no reason, and I had only left it alone for like 30 minutes.
Could this be a worm or virus?
or what else is there that I can do to fix this?
thanks for the help.