Two problems:
Automatic restarts, twice the "IRQL_NOT_LESS_OR_EQUAL" error message (computer isn't overheating) other times;
the error message
0X0000008E (0xc0000005, 0x804EE67B, 0xef26ea9c, 0x00000000)
appears.
I also ran Verifier.exe, which identified driver Afc.sys Arcsoft(R) ASPI SHELL...