Windows update stuck at 35%, cannot reboot in safe mode/repair

Hello.
Thanks for taking the time to help me out

Just want to put it out there immediatly, it's my girlfriend's laptop so I am not 100% sure of everything that was done for this problem to occur.

She told me she was updating the computer, and it seemed stuck at 100% for 10 minutes. She decided to reboot the computer (wether she should have or not is... another debate). When the computer restarts, it immediately shows the "preparing" phase, and after 5 seconds, it switches to "Configuring Windows updates, 35% complete, do not turn off your computer" (no progression to the 35... just.. jumps directly to it and stays stuck there)

What has been tried :
- Rebooting : Same result
- Rebooting in safe mode : Same result (but with bad resolution hehe)
- Rebooting in "Startup interrupt menu", choose temp startup device, USB windows 7, Troubleshoot
- - System Restore : No restore points have been created on your computer's system.
- - Go back to previous version : We ran into a problem and won't be able to take you back to the previous version of Windows. Try resetting your PC instead
- - Startup Repair : Startup repair couldn't repair your PC. Press Advanced options to try other options to repair your PC.

Anything further than that and i'm outside my competences.

If anyone can help me, i'll try to answer as precisely as I can to your questions.

bro67 said:

If you are doing the download install, it tends to get stuck and you have to shut down or wait forever. A hard reset and then boot up with the ISO, has worked for everyone. Anytime you do a upgrade, you need to back up the files on the computer, so that you do not lose files. Same goes with making sure the OS is not having any issues before the upgrade.

So... what do i do now that none of this has been done?

Hi,
It takes about 4 hours, sometimes longer, for a standard Laptop to update with the 1709 update and that appears to stall at numerous % points, several Restarts, however it is still updating and will get there eventually.
By interrupting that it will take longer.
Switch it on and let it get on with it.

bro67 said:

None of what has been done? You get a copy of the ISO by downloading CU and burning it, then put the computer into Repair mode when you turn it back on from a cold state.

No i mean none of the safety measures has been done ( backing up, restore point, etc )
but i did try to restore with the methods mentioned earlier

@ helmut : Alright i will try to proceed with that

Helmut said:

Hi,
It takes about 4 hours, sometimes longer, for a standard Laptop to update with the 1709 update and that appears to stall at numerous % points, several Restarts, however it is still updating and will get there eventually.
By interrupting that it will take longer.
Switch it on and let it get on with it.

Thanks... This was quite ridiculous but actually waiting that long fixed it.