Well, after the reboot I removed the USB and now it's asking "place an external device" :/
Anyway, I can solve this by restarting the installation process (with the usb boot) when it's fully charged...

So if I understand this correctly, I remove the usb when it reboots. Charge it again, and continue the installing by inserting the USB again after it charged?

It's almost done with copying files, next part is (not sure if this is the correct name since I'm installing a Dutch Windows) Parts and drivers install

Would I be able to remove the USB at that...

Hi guys,

I'm upgrading my 8.1 tablet to W10 with a bootable USB.
Now I didn't know it would take this long and it's still Copying files, problem is that it's been two and a half hours now and...