I can't offer a fix but I can suggest a philosophy. In my (limited) experience of my home pc grinding to a halt it has been some "helpful" actvity which was to blame. I can only quote 2 examples. Many years ago I had a pc that ran something called "Bigfix". It watched out for updates to everything on the pc and managed them. The mouse pointer would move over the screen like it was being dragged through treacle. I turned Bigfix off. The other event was Windows update. On an old pc, it was taking an awful lot of effort for it to trawl it's way through what it had / what it needed. I turned it off and ran update manually.
Of course, that's the easy part. Finding out what the cause was, was slow and frustrating. So, the philosophy? Do not use any of the over exuberant, puppy dog software that jumps up and down and shouts "let me help you!". Add on toolbars - kill 'em. Programs that run at start up time - kill 'em (after first checking you don't really them!) Programs that say "Can I automatically check for updates?" -no!
No matter how powerful your pc, all of this useless tosh will eventually drag it into the quicksand.
If you find yourself there at least W7 offers some help - CTRL, ALT, Del to fire up Task Manager, select Performance and then Resource Monitor and you can see what's doing all of the work.
John
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