Oberfrank
The BSOD all point to a memory related error... which means that BSOD are happening when read memory (this could be you local pagefile (hdd) or L1,L2,L3 cache of the the processor, or the RAM itself...
Since you have told me that you have done memtest for a 8 passes.. RAM is out of the equation... Since there are no Bugcheck 0x124 error processor are out of the loop... which then leaves the HDD.. for which I asked you post the SMART value... which again turned to be fine...
So....here is something you can do
1. Do sfc /scannow to check for error in Windows
2. Do a stress test on the hardware using
Prime95
3. Do a stess test on the CPU using
IntelBurnTest
Let me know your feedback once you do this...
Do all these after you make sure that devolo service is not the issue