Right at the end of booting, my PC blocked with blue screen. This happened once more, but giving blank screen. The error code on the blue screen was probably: STOP: 0x00000050 I say probably because the last 0 was not clearly legible. I have not installed any new hardware or software lately. I’ve done a memory test - ran MemTest for 45 mins with 0 errors. I had also done an HD test in the past. I attach the 2 minidump files of today’s fault. I would be greatly obliged if a knowledgeable guru could advise.