There are various reasons why Windows does not start. The first assumption is a defect in the boot environment that prevents the system from starting. However, causes can also be a defective file ...
If the BIOS update is stuck at 0 or 100 %, check if your motherboard has a Self-Healing BIOS feature and then follow these ...
If your SD card is slowing down or freezing the Windows computer, reinstall the USB Controller drivers, disable search ...