Leaving the computer overnight

Now I have this song stuck in my head.

Lady GaGa - Alejandro - YouTube

Alejandro85 said:

There is no harm at all in leaving it on all the time, as long as you have the fans on good shape. The only real risk compared to normal operation is overheating. But if it can withstand a regular day of full working, it should have no problems over the night.
Moreover, all recent CPUs have thermal protections, so that it will shut down immediately if it overheats past of a safety point.
I personally leave many times my notebook powered on at night and when at the office, and actually am in front of it little time really. As of now, after a year of such usage, nothing seems to be failing so far.

remove the lid/side panel point a desk fan in there, ive seen some frankenstein pc cooling systems like this were the owned doesn't have the money to repair or replace anything, you could remove all the components from the case and have them lying on a desk or shelf (probably not the safest option but it will keep your pc cool)

Is it time to repaste the processor heat sink? This is not that hard to do with plenty of rescources when you google your model for a video to repaste processor heat sink. This one is pretty good:



This will also give you better access to the fan to replace it if necessary, and is the perfect chance to blow out the dust and also replace the case fan if needed.