Sometimes updates themselves create issues instead of simply fixing existing bugs. Microsoft is aware of the Secure Boot error on Asus computers running Windows 7 after the installation of the KB3133977 update, as it clearly confirms this on its Support page: ASUS motherboards implement the Microsoft Secure Boot feature by default in order to  protect computers from malware attacks . Secure Boot does a loader check to boot into the OS. Unfortunately for  Windows 7 users, this OS does not support Secure Boot. When they install the update KB3133977, the system detects inconsistent OS loader keys which leads to boot failure. The Secure Boot is supported on Windows 10, therefore one possible solution would be to upgrade to Windows 10. However, if you don’t want to do this, you can use the following fix:

  1. Enter the UEFI and navigate to Advanced Mode Menu->Boot->Secure Boot 2. Change “OS type” to “Other OS”
  2. Press F10 to Save the changes and reboot 4. Check the UEFI Advanced Menu->Boot->Secure Boot, and confirm whether the “Platform Key (PK) State” is switched to be “Unloaded”. 5. Exit the UEFI, and the system will now boot normally. Speaking of upgrading to Windows 10, the undecided should take a decision fast because the upgrade is free till July 29. RELATED STORIES YOU NEED TO CHECK OUT:

Fix: There is a problem with this website’s security certificate on Windows 10 How to fix Wi-Fi range issues on Windows 10 Fix: The computer restarted unexpectedly’ loop on Windows 10

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