Pc randomly restarts without any error. Just bought it 2 weeks ago. There is no dumpfile in the minidump folder and. After it restart there was also no error recorded in the Reliability history...
Is this a prebuilt system that you "bought new 2 weeks ago"?
If so, I'd recommend that you contact the company you purchased it from regarding your issues.
If there is no warranty coverage, which would be unusual for a newly purchased system, then please list the exact model specifications for the CPU, motherboard, memory, storage devices and EXACT power supply model number which can be determined by removing the side panel and finding the model or product number on the specifications decal of the power supply.