After changes the Indexed (AKA indexing service) would, could run for weeks. Do you remember that?
Also your antivirus might notice and want to scan the entire machine.
Between these two I'm taking bets that many forget how our machines work and this can cause many to think MSFT has failed them.
This week Microsoft released quite a few updates. Since then, my friend's Windows XP laptop has become very erratic. It runs extremely slow, then suddenly speeds up for a very short while, then slows down again. This just started happening yesterday (Wed 10/14). No other changes have been made for a long while but the problem just started yesterday.
Does anyone know of any new updates that may be causing this?