Open the Command Prompt and run the following command to revert any pending update actions:
Need further assistance? Common error codes and their quick fixes are listed below:
Allow the system to restore the files and reboot the server. Method 6: Disable Driver Signature Enforcement windows server 2012 r2 boot repair
bcdedit /export C:\BCD_Backup attrib c:\boot\bcd -h -r -s ren c:\boot\bcd bcd.old Use code with caution. : bootrec /rebuildbcd 5. Repairing UEFI/GPT Boot Issues
Type bootrec /fixboot and press . This writes a new boot sector to the system partition. Open the Command Prompt and run the following
bcdedit /export C:\BCD_Backup attrib c:\boot\bcd -h -r -s ren c:\boot\bcd bcd.old bootrec /rebuildbcd Use code with caution. Copied to clipboard III. System Integrity and File Verification
Master Guide: Windows Server 2012 R2 Boot Repair A crashed Windows Server 2012 R2 production server demands immediate action. When a server fails to boot and displays errors like "Operating System Not Found" or a blank screen, the cause is typically a corrupted Boot Configuration Data (BCD) file, a damaged Master Boot Record (MBR), or an inactive partition. : bootrec /rebuildbcd 5
Choose Troubleshoot > Advanced Options > Command Prompt .