Antivirus company Sophos warns that Windows 11 KB5013943 causes PCs to crash with BSOD

The issue introduced by Windows 11 KB5013943 (May 2022 Patch Tuesday) is very serious: it can cause the computer to crash with a blue screen of death if it relies on certain drivers that are required by applications such as antivirus.

For those who don’t know, KB5013943 (May 2022) was released on May 10, it is an automatic security update, which means some users will not be able to choose whether to download and install it, they will encounter to serious errors such as BSOD or application crash. For those using Windows 10, the issue is also present in updates, but is worse on Windows 11.

This cumulative update was released to fix many issues and bugs in Windows 11, however, Windows 11 KB5013943 appears to cause the dreaded Blue Screen of Death (BSOD) on some systems with specific drivers, including those that support Antivirus software for the system.

Sophos has confirmed that the Windows 11 KB5013943 patch for the operating system causes a Blue Screen of Death, an error code that stops causing the desktop to become unresponsive due to a compatibility issue between drivers and the May 2022 Patch Tuesday.

A user who encountered the Blue Screen of Death error described their problem in the Microsoft Answers forum and Reddit, with one user stating "After updating to this version, after 10 to 15 minutes of playing Hitman 3 The BSOD appears within 1 second. The blue screen appears literally for 1 second, so I can't even see what error it is showing."

Another user added that they encountered blue screen errors with obscure error codes such as "APC_INDEX_MISMATCH" on their primary and secondary machines, including virtual machines.

Affected users claimed that the BSOD was triggered immediately after updating their devices to the latest version.

While Microsoft has not confirmed reports of Blue Screen of Death errors on Windows 11 machines, Sophos has confirmed that an update may prevent your device from booting.

"Customers running Sophos Home on Windows 11 may experience a BSOD/Stop error after installing Windows update KB5013943 and restarting their machine," Sophos notes in their support document.

"Symptoms include an inability to enter the desktop after restarting/powering off the computer after installing Windows Update KB5013943. This includes a Stop Error Index Mismatch message (blue screen)," the security firm noted.

To fix BSOD errors, Sophos recommends following these steps to uninstall updates:

• Pause Windows Update to prevent updates from being installed.
• Select Start > Settings > Windows Update.
• Suspend updates for 7 days.
• Open the control panel.
• Click on Programs and Features.
• Click to view installed updates
• Find KB5013943 and uninstall it.

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