Yesterday Revit 2025 got released and to check the new features I tried installing it but after getting installed Revit 21 stopped working neither Revit 25 is working I tried uninstalling but don't even show in installed programs, but I can see Revit folder and revit.exe.
EDIT 1: I was able to install Revit 2021 but I am facing another issue of getting the hotfix there is a 4-year window for Autodesk products I am not able to access thee refit 2021 updates or any other extensions.