George Karnos
Ansys Employee

Try the following:

Download the Software (If you are using an older download of 2022 R1)

Uninstall the Free Student version.
Rename the directory:
c:\Program Files\Ansys Inc
c:\Program Files\Ansys Inc_Old

Reinstall the Free Student Version by right click on setup.exe and chosing 
more->run as administrator

Does this allow you to run CFX?