Britec Tech Support Forum

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Secure Boot Violation


Invalid signature detected. Check Secure Boot Policy in Setup.

[OK]

I have an asus laptop with factory installed windows 8.1. I cleaned the hard drive turned secure boot off and enabled csm ,windows 7 which installed beautifully but when i turn secure boot back on and disable csm,windows 7 wont boot up ...instead i get this window that reads invalid signature is there a solution for this?

Asus x551ma intel Pentium n3520,4gb of ram,intel hd graphics

windows 7 doesn't use secure boot

Try this:
DISABLE "Secure Boot" and ENABLE "Legacy Support" in the BIOS. 

I did as you said it worked but i noticed during a system idle my ram usage was a little over 2 gb it was kinda weird,because im used to seeing about 903mb out of 4gb of ram during a system idle so i just cleaned the hd and installed. Windows 10 home

I am glad that fixed your issue. 

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