SYSTEM_THREAD_EXCEPTION_NOT_HANDLED boot loop.

Hi,

this is a costumer computer where Windows 10 crashed and is now in a boot loop, the costumer wants me to roll back to Windows 8, the problem is that I cannot boot into W10, the furthest I've gotten is to the W10 boot logo and then the BSOD hits.

I've tried doing these things:
Enable & Disable Secure Boot.
Switch From/To UEFI / CSM

F8 doesn't register so I cannot even get to the advanced options or to a cmd window to do the sfc /scannow command.

Can't boot from an external cd dvd drive, I changed boot order, I see a flashing underscore/fat white line in the upper left corner like it is trying to boot from the drive, I can also hear it spin up and there is no text "press any key to boot from cd or dvd"..

aaaand we are back to the screen with sad face.

Any ideas, have I missed some obvious thing here?

Hi BorisTheAnimal,

When the system crashes a few times on boot, you normally get troubleshooting options.
Can you get access to it?

axe0 said:

Hi BorisTheAnimal,

When the system crashes a few times on boot, you normally get troubleshooting options.
Can you get access to it?

No, no matter how hard I smash F8 in, I never get to any kind of troubleshooting screen.

You don't need to press f8, f8 is for the safe mode

The system crashes,
reboots,
crashes,
reboots,
crashes,
reboots
and then you should get the troubleshooting options when booting.

axe0 said:

You don't need to press f8, f8 is for the safe mode

The system crashes,
reboots,
crashes,
reboots,
crashes,
reboots
and then you should get the troubleshooting options when booting.

Meh, gonna be a long wait.

The usual causes for the system_thread_exception_not_handled crash are

• Insufficient disk space,
• Device driver,
• Video card,
• BIOS,
• Hardware incompatibility,
• Faulty system service,
• Memory,
• 3rd party remote control

I have removed 1, because it is not valid for this.

What I would like to try is to boot into safe mode via the command prompt in the advanced troubleshooting options, you need to open msconfig via the command

Code:

start msconfig

and from there go to the boot tab to enable safe mode.
This is a simple workaround for safe mode, but it usually works :)

If this works, then we can almost for sure assume a system service or driver is causing the problem.

axe0 said:

The usual causes for the system_thread_exception_not_handled crash are

• Insufficient disk space,
• Device driver,
• Video card,
• BIOS,
• Hardware incompatibility,
• Faulty system service,
• Memory,
• 3rd party remote control

I have removed 1, because it is not valid for this.

What I would like to try is to boot into safe mode via the command prompt in the advanced troubleshooting options, you need to open msconfig via the command

Code:

start msconfig

and from there go to the boot tab to enable safe mode.
This is a simple workaround for safe mode, but it usually works :)

If this works, then we can almost for sure assume a system service or driver is causing the problem.

But that is the real issue, I cannot access any advanced options menu.
Also upon boot I sometimes see a text with something like "Applying automatic repair" and then there is a small circle of small circles doing a loop but it stops immediately after moving a millimeter and then I see the mentioned BSOD.

This is how you can get into the troubleshooting options, this shouldn't be something you have to do anything for.

The system crashes,
reboots,
crashes,
reboots,
crashes,
reboots
and then you should get the troubleshooting options when booting.

I understand you can't boot from an external device (cd/dvd or something), but you also can't get into the troubleshooting options after the system crashes 3 times?

axe0 said:

This is how you can get into the troubleshooting options, this shouldn't be something you have to do anything for.


I understand you can't boot from an external device (cd/dvd or something), but you also can't get into the troubleshooting options after the system crashes 3 times?

Yuuup.

Is the BIOS loaded for optimal settings?
Thus, loading the default settings and where necessary tweaking the settings.
I can understand if you don't know what setting might need to be tweaked.