"It's not really a problem until it happens again after a reboot"
Most problems occur when Windows doesn't clean up after itself. 80% of 'problems' are corrected with a fresh start. Make sure you power down the computer completely (shutdown) and leave the power off for a least 15 seconds.
Quote of the Day
G. C. Lichtenberg
He who is in love with himself has at least this advantage -- he won't encounter many rivals