open Windows Explorer and go to C:\ProgramData\PTC\Licensing directory. You should see license file located in it (name is similar to BK410705EDSTUDENTUNICL_license.dat). The file contains Creo license. If you do not understand the contents of the file, upload it and I'll provide and explanation.
How to use license file during installation ...
- You can un install Creo and install it again from the scatch.
- Do not enter Poduct code, put path to license file into Source field.