Blue screen error: System thread exception not handled

Document created by dcollins Employee on Apr 10, 2018Last modified by jyamada on May 1, 2018
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If K9 Web Protection and Malwarebytes for Windows Premium are both installed on the same computer, you may encounter a blue screen referencing the error:

 

SYSTEM THREAD EXCEPTION NOT HANDLED (bckd.sys)

 

Your PC ran into a problem and needs to restart. Well restart for you. If you’d like to know more, you can search online later for this error: SYSTEM THREAD EXCEPTION NOT HANDLED (bckd.sys)

 

Cause

K9 Web Protection may conflict with Malwarebytes' Web Protection, causing a crash followed by the blue screen error above.

 

Workaround

To prevent blue screen errors, uninstall K9 Web Protection from the computer or, if you have K9 Web Protection v4.4 or newer, disable Google SSL redirection.  Disabling Google SSL may not prevent blue screen errors and may cause some websites to experience issues.  For instructions, refer to K9 Web Protection's article How to configure K9's settings.

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