I had this problem, kinda.
Even though I set the darn thing to run pc checks at 6:00 am (when I'm least likely to be using it, or recording anything) it would consistently start up in a (from what I can tell) a very random...
Why don't u first find out the offending process that is running in the background and see if u can shut it off or remove it completely?
When u notice your laptop slowing down and the harddrive start to run on endlessly, bring up your...
u can create a hardware profile for watching DVDs. Shut off all but the mandatory services, disable all the wirelss tuners, usb drives etc. and use that for playing your DVD's.
Many people do this for gaming. Create gaming profiles that...
$1000 is very reasonable. Especially with the 2 batteries and adapters. Might want to also add the remaining warranty (if any) thats left on it in your FS thread.