Hi, Andrew_1114 . I'm sorry to hear you're having this problem, and I hope I can assist you to find a satisfactory solution.
You may have installed windows on another disk, but the boot may have been on the same hd, which should be the error trying to iniciate windows 10
To solve the problem:
Enter Windows 11
Press Win+R to open the Run box, type msconfig and press Enter.
Open the "Startup" tab, and make sure you have both versions of Windows, select the Windows 11 version and click the "Set as default" button to make it the default option at boot.
Please note: This is a user-to-user community forum. We are users just like you who help others. We are not employees of Microsoft.