If when you start up your PC you don't see any boot menu at all, you'll need to first learn how to make your GRUB menu appear ...

Some users have complained about this problem that when they start their computer, it doesn’t boot. Instead, a Default Boot Device Missing or Boot Failed blue ...

Download Windows ISO Create a Bootable USB or DVD drive Boot from the media and choose “Repair your computer.” Under Advanced troubleshooting, choose Startup Repair If you cannot boot into Windows ...