Restoring Windows 7 and Windows 2008 R2 when System Reserved Partition is not backed up.
BOOTMGR is missing
While starting OS not able to find the boot file bootmgr and Boot Configuration Data.
Restore the partition which has the OS to any drive which has free space more than the size of the data been restored.
Boot the system using Windows Installation Disk for respected OS which is been restored.
- Select Repair Your Computer.
- Use the radio button to launch Recovery Tools and proceed Next.
- Select Command Prompt to launch the console.
Setting the volume ACTIVE.
- Type Diskpart to enter into utility to update partition info.
- Type List Disk to get the list of disk drives connected to computer.
- Note down the number ( # ) of the disk on which the OS was been restored.
- Enter Select Disk # and press enter.
- Type List Partition to get information of the available partitions on the disk. Note down the number again.
- Enter Select Partition # to select the partition to modify.
- Type ACTIVE to set the partition active and Exit diskpart.
Reboot the System, boot again using the OS installation disk and launch command prompt.
Navigate to the volume where the OS was restored and note the drive letter. Default [ C:\ ]
Creating Boot Configuration.
- Copy file bootmgr from X:\Windows\Boot\PCAT\ to the root of volume of the restored OS
- Run BootRec /RebuildBCD to list the OS installed on the volume.
- Select Y to add installation to boot list.
- Reboot the system to check if the OS starts up.
Please refer to Microsoft Articles for better explanations regarding the commands.
Restore of the OS Partition without restoring System Reserved Partition.
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