Over time your computer, like your car, doesn't run as well as it once
did. You may do all the things you're supposed to
like defragment the
hard drive, clean the registry, remove junk files and so on. Often,
after a period of time, it's not your maintenance that's the problem.
More likely your copy of Windows has become corrupted. Through power
outages, power surges, turning the computer off improperly, and many