I don't know if later OSs are affected but XP and earlier versions can be slowed down by having a lot of stuff on your desktop.  Large files or folders on there will make it slow to a crawl.

Judging by the replies, I guess msconfig is no longer accessible.  Pity, because that's a simple way to switch off a lot of rubbish.

Coppula eam se non posit acceptera jocularum.

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