IRQL_NOT_LESS_OR_EQUAL means one of two things: driver issues, or a bad Windows Service caused by a backup utility or antivirus scanner.
First step is to try and get the computer to load in safe mode. From there you can take a look at what is causing the issue you are having.
Windows 10 Booting in safe mode Automatic repair / Windows 10 Boot In Safe Mode / Windows wont load (zohodesk.com)
- If the computer will not boot it is likely the motherboard, CMOS battery or Hard drive and in some cases the graphics card. You will ant to have a technician take a further look.
If you have the option to start swapping out parts one by one to rule out bad components this is also a good test.