I just tried underclocking it again and it didn’t make any difference, it’s just crashed about 5 times in half an hour. It’s running at 65-75 degrees Celsius which from my limited knowledge I think is ok? I am totally out of ideas. Thanks for trying to help me.

Rhaevaris - if it is a hardware problem how can I find out which hardware is causing the issue? I can’t find anything to help me online