If you upgrade your motherboard, CPU, or hard drive on an offline-activated machine, Acrobat will see it as a "new computer." You must repeat the entire offline activation process.
Additionally, the user might be looking for alternatives if offline activation isn't feasible. Maybe suggest using a USB drive for activation or portable versions if available. Also, note if there's a significant change in newer versions. For example, Adobe Acrobat DC might have different offline activation policies.
