If you see the below message appear when trying to install LockDown Browser, this means your computer is likely in S mode.
Windows 11 in S mode (and Windows 10 in S mode) is a version of Windows that's streamlined for security and performance, while providing a familiar Windows experience. To increase security, it allows only apps from Microsoft Store, and requires Microsoft Edge for safe browsing. To be able to install Respondus Lock-Down Browser, it is necessary to exit S Mode.
To check if your PC is using S-Mode, follow the steps below.
If you see the words “in S mode” to the right of the Edition entry, you're using an S Mode PC. If you don't, you're not using S Mode. Please contact the eLearning Center for assistance with installing Respondus Lock-down Browser.
To exit S mode, follow the steps below.
Keep in mind that Microsoft states that once you disable "S" mode, you won't be able to re-enable it on that device. Considering this, you might want to acquire a compatible operating system to ensure you can use LockDown Browser for your required exams.
Note: Boost Your Security
After leaving Windows 10 S Mode, bolster your system's security by enabling a reliable antivirus program.