Post date: Mar 21, 2017 8:33:51 AM
1. Boot computer with Windows Server 2012 or 10/8/7 installation media and press Shift + F10;
2. Run the following commands at the command prompt:
bootrec /fixmbr + Enter
If you receive the error message “Element not found”, you may need to mark the boot partition as active with diskpart firstly.
3. Enter below commands at the command prompt:
diskpart
select disk 0
list partition
select partition #
Note: Select the "System Reserved" partition (if you have it) or the Windows OS partition.
active
exit
4. Type: bootrec /fixboot + Enter in the command prompt;
5. Type: bootrec /rebuildbcd + Enter in the command prompt;
After these steps, you can reboot PC and continue use your computer again, and the deleted system reserved partition will be restored.