Did you get an error that does not let the ASUS PC from booting into Windows? You have been stopped in the UEFI display because of having an error code stating ‘Invalid signature detected. Check Secure Boot Policy in Setup’. This issue is not only faced by ASUS users. It can happen on any of the laptop brands. There is nothing to worry about it. You just need to go through this blog carefully, and your problem will be solved immediately. Change Boot Priority or remove an external drive Firstly, turn off Secure Boot Control. Then, turn on the CSM.