Press WinKey+X to open the Quick Link menu. Hold down Shift and click Restart. Click Troubleshooting and then Advanced options to bring up the repair options. In some cases, it may be easier to press F8 early to open the BIOS Boot Menu and then select the Windows drive to boot and immediately press F8 again. Note: If your computer uses the F8 key for the BIOS Boot Menu (ASUS boards, for example), make sure to start pressing the F8 key after the BIOS screen has passed and before Windows has started to boot. Then select the Repair your computer option from the boot menu that appears. Press and hold the F8 key early in the system boot process.
The method used depends on the version of Windows: Windows RE may also be accessed manually if it's installed to a local hard disk and is enabled. If Windows RE is functional, Windows will automatically run it if a boot failure is detected. Most computer manufacturers or administrators configure Windows systems with Windows RE installed to a local hard drive. In addition, current versions of Windows will automatically install and enable Windows RE when Windows is installed or upgraded. The Windows Recovery Environment (typically referred to as Windows RE or WinRE) is partially analogous to the Windows Recovery Console of Windows 2000/XP.
This article applies to Windows Vista and Windows 7/8.x/10.
