After the install process, a software application executed an online activation process. After a few months, the system experienced a hardware failure. A backup image of the system was restored on a…

Malware-modified binaries are a possible cause of application failure in general, but the scenario describes a hardware change event as the proximate trigger, making hardware fingerprint mismatch a far more likely and direct explanation.

Remote attestation is a TPM-based process distinct from standard online activation, and any port-blocking issue would have prevented activation originally rather than appearing only after a hardware revision change.

If the backup image were encrypted with the wrong key the restoration process itself would fail entirely, meaning no software on the system would function, not just the single specialized application.

During online activation, many applications compute a hash combining hardware identifiers such as CPU serial, motherboard ID, and NIC MAC address to create a unique machine signature tied to the license. When the image is restored to a newer hardware revision - even of the same brand and model - one or more hardware identifiers differ, so the computed hash no longer matches the stored activation record and the application refuses to run.