I have a problem, when i am booting my laptop it is loading and then shows a bluescreen with this title : DRIVER_IRQL_NOT_LESS_OR_EQUAL (epfwwfp.sys) and next it start diagnostic tool and it shows nothing only to restart.

I installed Windows 10 on it start day and it install good but i restart it and than it wasn’t boot.

Laptop is :

HP Envy 17 – j040ec

Before update Windows 8.1

I have many files on disk and i wasn’t lose it.

I need to restore to Windows 8.1 or repair Windows 10.

***Post moved by the moderator to the appropriate forum category.***

TYPE ON COMMAND PROMPT:

DEL /F /S /Q /A “C:\Windows\System32\drivers\epfwwfp.sys”