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Kernel Security Check Failure Windows 10 Z400

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i just installed 3 days before windows 10 into my z400 workstation.
Today i while usual net surfing rcvd the blue screen error
Stop Code : Kernel Security Check Failure.

When it restarted after that blue screen.
it gave the error Missing Operating System.

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your error can be caused by a bad driver, malware, memory, corupted OS


to try to isolate the problem


1. remove all ram except for one stick, and if still BSOD/kernal error swap in another stick


if the above does not resolve the errors, then the ram is most likely good


install all ram and run a memtest like  " memtest86+ "


2. if ram passes redo the windows install and only install the drivers that windows update finds


if redoing windows fixes the error, then load only one or two software apps and test


the basic idea is to isolate each item, test and determine if it is or is not part of the problem


in other words divide and conquer

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