I've got a problem with my laptop - it won't sleep. Specifically, when I try and make it sleep, the screen turns off and I cannot interact with it at all - but the computer just keeps going. All the activity lights stay on, and while I can't see or do anything, the computer stays on and will not sleep, leaving me with no choice but to manually force shutdown. Sometimes if I leave it like this for a while, it will simply crash and shut down incorrectly.
I have gone into the power-plan settings and checked my advanced settings, but that hasn't worked. It's just come on in the last few days, but I haven't installed anything new in that time. I'm going to try a system restore now, but I don't hold much hope for it.
Any help would be massively appreciated.
(FYI, I'm using a Samsung R530, 32-bit Windows 7, Intel Pentium.)