Answer:
Your student license is linked to your computer. After the initial activation of the license on your PC, a "fingerprint" with the information about your hardware components is sent to us. If you then try to activate the same license on another PC, the described message appears.
Exchanging certain hardware or formatting/partitioning the hard disk also leads to loss of the license. To prevent this, you should transfer the license to another PC beforehand. After you make the changes, you can transfer the license back. This process is described in the PDF, on page 2 ff.
