An is a unique alphanumeric string that unlocks the full functionality of the software. It is not the same as the installer file.
If your school computer is air-gapped:
To activate , you typically need a Registration Name and a Registration Number (often referred to as an activation code) provided by the developer after purchase. How to Activate aSc TimeTables asc timetables activation code
You are using a code for "aSc Timetables" (older version) on "ASC UniTime" (new version). Fix: Codes are version-specific. A code for v.2016 will NOT work on v.2024. You must either download the legacy installer from the ASC archive or pay for an upgrade (usually 30-40% of the new license cost). An is a unique alphanumeric string that unlocks
