I am running Parallel's Desktop for Mac and Windows 11 on an iMac Apple M1. When trying to install an update for windows 11, this warning came up. "The Secure Boot feature prevented the operating system from starting. Secure Boot found unauthorized changes to the firmware, operating system, or UEFI drivers. To manage Secure Boot settings, go to the virtual machine configuration settings, click Hardware, and expand Advanced Settings." When I clicked oh Hardware, I got another warning that said "Some of the settings on this page cannot be changed until the virtual machine is shut down" I have been trying to get help with the issue.
Hello @DebbieH3 , This issue has been fixed in Parallels Desktop version 26.3.3. (Download Link) Please shut down your virtual machine (Actions > Shut Down) and upgrade to the latest version using the above link. Check if the issue is still being experienced. Thank you!