"Fix a computer for a friend or family member, and you'll be tech support for life."
For every fix that a Windows Update patches, the update will break two more things on your PC.
he likelihood that Windows will automatically install time-sucking critical updates is directly proportional to your need to get your PC started.
The hard drive always fails just before you were going to back it up
Your data will get corrupted just before you plug in your new backup external drive
The number of USB ports on your Mac will always be one less than you need at any given time.
If you close the PC case with screws before testing, it won't work; If you test before closing, it will.
Read some more interesting laws here.