Windows BSOD Error 0x00000043 — NO_SUCH_PARTITION Fix

What Does This Error Mean?

The 0x00000043 blue screen error means Windows couldn't find a partition it was expecting to find on a disk. This usually happens when a disk's partition table gets corrupted, a drive is disconnected or fails, or storage changes are made that confuse Windows at startup. It's more common after adding, removing, or changing storage drives in a computer. Partition repair tools can usually fix this without losing your data.

Affected Models

Windows 10
Windows 11
Windows 8.1
Windows Server 2016
Windows Server 2019

Common Causes

Corrupted partition table on the boot drive caused by an improper shutdown or crash
A storage drive was removed or disconnected and Windows expected to find it
Disk signature collision where two drives have the same disk signature after cloning
A recent change to disk partitions (resize, merge, or delete) corrupted the partition structure
Hard drive failing with bad sectors affecting the partition table area at the beginning of the disk

How to Fix It

Boot from a Windows recovery USB or disc. Create one using the Windows Media Creation Tool on another PC if needed. Insert the USB, restart, press the Boot Menu key (F8, F11, or F12), and boot from the USB.

You must boot from recovery media because Windows can't repair its own partitions while it's running.
Run Startup Repair from the recovery environment. Go to Troubleshoot > Advanced options > Startup Repair. This automatically repairs boot partition issues including corrupted partition boot records.

Let Startup Repair run completely — it may restart the computer one or more times during the process.
Open the recovery Command Prompt and run bootrec to repair the boot records. Go to Troubleshoot > Advanced options > Command Prompt and type these commands one at a time, pressing Enter after each: bootrec /fixmbr bootrec /fixboot bootrec /rebuildbcd

These three commands repair the Master Boot Record, the boot sector, and the Boot Configuration Data (BCD) file respectively — the three components that tell your PC where Windows is.
Check if all storage drives are properly connected. If you recently opened the PC case or changed hardware, confirm all SATA data cables and power connectors are fully seated on all drives. A drive that's partially disconnected causes partition detection failures.

Also check the BIOS/UEFI boot order (press Del or F2 at startup to access it) to confirm the Windows drive is set as the first boot device.
If bootrec doesn't fix it, try using diskpart to check the partition structure. In the recovery Command Prompt, type: diskpart then list disk, then select disk 0, then list partition. If the partitions look wrong or are missing, the partition table may need repair with TestDisk (a free partition recovery tool you can run from a USB).

TestDisk is a powerful free tool (available at cgsecurity.org) that can analyze and rebuild corrupted partition tables without deleting data.

When to Call a Professional

If the recovery tools below don't fix the problem, take the computer to a technician. Partition table recovery requires specialized tools and knowledge — mistakes can cause permanent data loss. A technician can use professional data recovery software to reconstruct the partition table before attempting any repairs.

Frequently Asked Questions

Can I recover my data if my partition table is corrupted?

Yes — partition table corruption does NOT mean your data is gone. The data is almost always still on the drive; it's just that Windows can't find it without a working partition table. TestDisk (free) can often recover the partition table and restore full access to the drive. If TestDisk doesn't work, professional data recovery services can recover data even from drives with severely damaged partition tables.

What causes a disk signature collision?

When you clone (copy) one hard drive to another, many cloning programs copy the disk signature too. If both the original and cloned drive are connected to the same computer at the same time, Windows sees two drives with identical signatures. This confuses the partition system and can cause NO_SUCH_PARTITION errors. To fix it: disconnect the original drive after cloning, or use diskpart to give one drive a new disk signature.

Will running bootrec delete my files?

No — bootrec only repairs the boot records and boot configuration. It does not touch your personal files, programs, or Windows installation. Bootrec is a safe repair tool designed specifically to fix boot problems without affecting user data. Always back up important data when possible, but bootrec itself does not delete files.