Hi,
If it's an application, right-click and select Properties > see if there's an "unlock" option.
If it's on a DVD, copy the files to a folder, hold down Ctrl+Shift, right-click, select "run as another user," and try to start the application.
If possible, take a screenshot of the error.
Check if you're not in Windows S mode in the Start menu > Settings > System > Activation; see if it's set to Windows 10/11 S.
Thanks