Glade you got it back up and running.
Itís always a good first step in trouble shooting PCs is to do a full and complete shut down and then reboot.
A rule of thumb when I do this is to let the computer set for at least 30 seconds after shutting it down. This will allow the capacitors within the computer to fully discharge.
For desk tops, another method to ensure the capacitors are fully discharge is to unplug the power cord after shut down, then push and hold the PC's power-on button for 20 Ė 30 seconds. For a laptop you need to unplug the power cable plus remove the battery to do the same procedure. Pushing and holding the PC's power-on button when all power cords are disconnected will discharge the capacitors.
The reason for ensuring the capacitors are fully discharged, is that this also ensures all volatile memory (e.g., RAM) of the computer is fully cleared. Volatile memory is typically the memory where current settings are maintained during use and some times gets corrupted causing funky things to happen. Volatile memory, is only fully cleared when all power is removed from it. It takes some time for the capacitors to discharge. If the capacitors still have power, they could also be providing power to volatile memory causing them not to be fully cleared. Therefore, if you power up before they are fully discharge, the volatile memory may not be fully cleared and you problem (i.e., corrupted settings) may still be in memory.
Hopefully this provides you some insight why doing a complete and full shut down resolved your problem.