|"The PC keeps restarting"|
As stated above, 61C isn't overly hot unless it's the idle temperature. And if it is, you're going to have to remove the heatsink, clean off all the thermal paste, apply a fresh dab of paste, then reinstall the heatsink again. Proper paste application is critical. All AMD CPUs/APUs use the 'middle dot' method:
Another possible cause of random reboots is an overloaded power supply. Unfortunately, no PSU is listed in your specs. We need the brand/model/model number, wattage, & amperage specs on the +3.3v, +5v, & +12v rails. If you don't know, open the case & get the info from the label on the side of the PSU.
"Standard VGA Graphics Adapter"
The graphics are AMD Radeon HD 7560D & are built into the A8 CPU. If your hardware list shows "standard VGA graphics", it means you haven't installed the video drivers.
"Generic Non-PnP Monitor (1024x768@1Hz)"
Do you have an old CRT/tube type monitor? If you have a LCD monitor, my guess is the display settings are out of whack.