Hello, I know that motherboard very well and I have fought a lot with it. Have you thought about touching the heatsink of the VRMs? you could possibly burn your hand. you have to put a small fan forcing air towards them. and also change the thermal paste on the chipset. these components get too hot making the processor consume more voltage and overheating it. in addition to that, depending on the BIOS you have, you have an option to limit the power according to the processor's TDP. something that the Chinese have implemented recently. remember that the motherboard has recycled elements from servers. chipset, VRMs etc etc and are components designed to work with forced ventilation.

@sebastian To be honest, I don't quite understand what you're saying, but if you're afraid of installing Windows on top and it erasing important data, like photos, I don't know if you have the option to take out the hard drive, plug it into a USB enclosure and use it as an external drive. That way you could use it as if it were an external drive, or a USB stick. You could copy the data to another computer and then try to repair Windows.

If you insert the Windows DVD or USB, there is an option to repair Windows. It may take a while, and depending on the version of Windows you have, it may vary a bit, but in general it is a simple process that, as I say, may take a while, depending on whether the hard drive is mechanical or SSD.

If you tell us the version of Windows, we'd better.

Best regards.