From windows101tricks.com - December 11, 2017 11:49 AM

Getting Blue Screen error APC_INDEX_MISMATCH Bug Check 0x00000001 at startup, Due To this blue Screen Error unable to login to windows ? This is mostly occur due to incompatible, out dated or corrupted display driver. also some times Virus infection, Incompatible Third party application, or corrupts system files etc cause this issue. Here some applicable solutions to fix this