To tinkering with the insides of a PC. I've generally followed a policy of getting someone else to do it, even if I have to pay them when 'owt needs doing inside the case on my PC, even cleaning. Never wanted to risk messing up my only PC on a first attempt. But with my new PC due at some point (Thank you OC, no thanks to you DPD), I'm going to have an elderly basically working, but undiagnosed BSOD prone PC knocking around, and it occurs that trying to sort it out would be a perfect opportunity to start teaching myself the art of cracking open the case and fiddling around.......So as I say, looking for beginners guides to all that mysterious realm which lurks within the case. Should start with cleaning I suppose if there's anything on that.