
If you have a Windows 8 computer that comes with the newer UEFI firmware, you’ll need to use Windows 8’s advanced boot menu to select your USB drive or DVD drive when you boot your computer. If it doesn’t, you may need to change the boot order in your BIOS.

It should automatically boot into the Windows 10 installer.

Leave the DVD or USB drive in your computer and reboot. Microsoft’s Windows USB/DVD Download Tool still works well, and will let you image a Windows 10 ISO file onto a USB drive. Download Windows 10 and Boot the Installerĭownload a Windows 10 ISO file and either burn it to a DVD or make a bootable USB flash drive. After shrinking the partition, you can continue the process.
