I'm running Ubuntu on an Asus ultrabook and today I run standard update. When finished I was told to reboot the system, which I did, but it did not turn on, I received the message "Verifiying shim SBAT data failed: Security Policy Violation. Something has gone seriously wrong: SBAT self-check failed: Security Policy Violation". What can I do? Now my pc is useless unless I switch to Windows
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