Sometimes a System Restore operation has the unintended consequence of messing up a program you recently installed. The net effect is that a program may appear to be installed but is missing vital files that were “unhooked” by the System Restore operation. Because you probably ran System Restore to recover from a disaster, I don’t recommend undoing the System Restore. Instead, what you need to do is reinstall the program that’s screwing up. Doing so reconnects the items that System Restore disconnected.
Beyond providing power, the power supply’s other job is to keep the console cool. It’s such a big job that the power supply’s fan isn’t the only fan inside the case. Another important fan is located atop the processor. High-end display adapters sometimes sport two fans. And additional fans can be found inside the case. Keeping cool is a big deal inside a PC. That’s because heat causes most console problems. When the temperature gets too high, electronics fail. The computer could restart. Cables could disconnect. A constant temperature is preferred, and the fans inside the console help to maintain that constant temperature.