And you may receive error messages likeBOOTMGR is missingorOperating System not found.

It contains the boot loaders or kernel images for all installed operating systems.

That is to recover deleted system partition or fix boot information.

choose partition recovery of MiniTool Partition Wizard

Then, lets see how to do the recovery.

To use this bootable partition manager to recover partition, you should purchase a paid version.

If you are not a Server user, the Professional Ultimate Edition is available.

scanning range settings

See the guide here:How to Build Boot CD/DVD Discs and Boot Flash Drive with Bootable Media Builder.

Here, take how to restore system reserved partition Windows 10 as an example.

Of course, the one holding the same version as your Windows is also available.

scanning method settings quick or full scan

Then, you’re able to start fixing.

For Legacy BIOS Users

This method will not create a new system reserved partition but do fix only.

So, if you want such a partition, try other methods.

check all partitions to restore

Every key in in Command Prompt, as well as Diskpart, should end with pressing on Enter key.

In the window of Command Prompt, typediskpartto activate this partitioning tool.

Just typeYesand then quit from Command Prompt.

click apply to make all changes effective

Once the bootable partition manager is created, boot your machine via the disc.

Then, MiniTool Partition Wizard will show you disk and partition layout.

At last, click theApplybutton to make all changes executed.

Windows 10 installation media

Then, you might remove the Windows installation disc and power cycle your box.

This way is helpful to repair EFI partition when Windows cant boot after deleting system partition.

There are ways to help both Legacy BIOS and UEFI users fix boot information of Windows.

rebuild system reserved partition

Next, start the file backup.

Step 1: Run MiniTool ShadowMaker.

Step 3: ClickBack up Nowto immediately initiate the file backup.

MiniTool ShadowMaker back up files

PC is not booting but you want to back up files without booting to save them?

This post will show you how to back up data from a computer that wont boot.

Once the backup is completed, you’re free to reinstall Windows without worrying about losing personal files.

How to Back up Data without Booting Windows? Easy Ways Are Here!

How to Reinstall Windows

Windows reinstallation is not an easy thing.

Final Words

Windows cant boot after deleting system partition?

Deleted System Reserved Partition FAQ