DRIVER_IRQL_NOT_LESS_OR_EQUAL
is a famous Blue Screen of Death error,
often caused by a bad driver somewhere.
The Internet is awash with reports of variants of this error.
This particular variant, L1C63x64.sys
,
was an occasional occurrence for me on Windows 7,
but seemingly only while torrenting.
Upgrading to Windows 10 turned the error from occasional to frequent within the first few days,