If activation fails, ABBYY’s support may offer a one-time activation exception for legacy customers.
If you previously purchased the software and need to recover your key, there are several reliable locations to check:
For digital purchases, the serial number is sent via the email address used during checkout.
Built-in OCR can copy text from images pasted into OneNote. Surprisingly effective for basic needs.
If you bought a boxed version, the key is usually found on a card inside the CD case or printed on the End User License Agreement (EULA).