Remember that jiggling the cord a bit isn't the only uberadvanced troubleshooting technique available to you. I say uberadvanced, because the techniques I'm about to describe go much further than resetting systems, reconfiguring network components or reinstalling drivers. These techniques are the ones used as the last stop before reinstalling the whole system, and they go a little like this.

Restart a couple more times: You might think a reset might clear everything up. This often works, but for the uberproblem just a single reset may not be enough. An uberproblem is one which appears through no outside intervention such as installing new programs or hardware. It's an organic, mysterious glitch, which requires an equally mysterious solution. Restarting a prodigious number of times is a rather mysterious solution, as it shouldn't really help anything at all. Another gypsy-nerd solution may be to leave it turned off for a couple of minutes to cool down, which many may have expected to die out when NESs became obsolete. This is used for periperal devices more than the computers themselves, as these have plenty of time to cool down while you're jiggling components, removing them, putting them back in, and swapping their positions.

This afternoon I've had to employ a cooldown and multi-restart on my adsl modem, and then a video card jiggle, just to bring you these words.

For I am uber.