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Windows 10 June updates cause LSASS errors

June's updates appear to have caused crashing issues with the Local Security Authority Subsystem Service (LSASS) system, forcing some Windows 10 devices to restart.

LSASS is responsible for enforcing security policy on Windows systems and is used by the system to add entries to the security log file, as well as to manipulate user connections, changes to passwords and creating access token.

When the LSASS fails, the user will immediately lose access to all accounts available on the machine, an error will occur and the machine will be forced to restart.

Windows 10 LSASS

Devices running Windows 10 1809 or later are affected

Microsoft explains that LSASS may fail to work on certain devices by displaying the error:

The well-known issue was added today by Microsoft to the registrations of the cumulative updates KB4557957 and KB4560960 that were published as part of it. updated version this month, as well as the entries in the optional updates KB4567512 and KB4567523 that corrected a previous issue that caused printing problems.

While these updates can only be applied to Windows 10 versions 1903 or later, users have also reported encountering the same problem with devices running fully updated Windows 10 installations, version 1809.

"We have some machines in our domain that crash when connecting," said one user. The message “O. computer you will automatically restart in a minute ”and then be forced to restart. "Once restarted, they can reconnect and continue working until the next day."

Microsoft has not yet made an official announcement

Microsoft has not yet officially acknowledged the issue, nor is there any official fix.

Although there is no official fix for this, users who cannot use their devices due to LSASS cracking can get rid of the problem by uninstalling the June 2020 cumulative updates.

Before you can uninstall the two cumulative updates, you must first know that you are also removing mitigation issues. security affecting your Windows 10 device.

Microsoft says in the details of the two updates that they can be removed "by selecting View installed updates in the Programs and Features Control Panel."

If you still want to uninstall, you must follow this procedure:

  1. Select the Start or Search Windows desktop button and type update history and select View your Update history.
  2. In the dialog box Settings / View update history, select Uninstall Updates.
  3. In the dialog box Installed Updates, find and select KB4560960 or KB4557957 and select the button Uninstall.
  4. Restart your device.


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Teo Ehc
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