Windows 10 20H2: BSoD after chkdsk command

Microsoft's latest version of Windows 10, Windows 10 version 20H2, appears to contain a which can corrupt the Windows partition file system and cause blue screens on reboot.


Reports indicate that running the chkdsk command may damage the file system, resulting in a blue screen of death (BSoD) on the first system restart after the disk check operation is completed.

Günter Born reported the problem with more details on of.

He states that one discovered (German forum link) the problem after upgrading the systems to Windows 10 version 20H2 and running chkdsk c:/f after installing the update.

The command checks the c: drive for errors and fixes them immediately if any.

The devices encountered an NTFS error System on reboot. Analysis of an active device, which had been disk checked, showed that the partition where Windows was installed appeared as a RAW partition, suggesting that the chkdsk command repair corrupted the NTFS file system.

Further analysis provided the following information:

  • Systems running Windows 10 20H2 appear to be affected.
  • The issue seems to be affecting Solid State Drives but one user reported that a VM on a regular hard drive was also affected.
  • The cumulative update KB4592438, released on Patch Tuesday, December 8, 2020, seems to be the cause of the issue.

It is not clear if all Windows 10 20H2 devices are affected or if the problem is only with devices with certain features. It has been confirmed that no new installation of Windows 10 in version 20H2 is affected.

So administrators should back up their Windows partition before running the Check Disk command on Windows 10 20H2 devices that have December 2020 updates installed.

Microsoft has not yet confirmed the problem.

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Written by giorgos

George still wonders what he's doing here ...

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