This guide covers legitimate licensing issues. If you are using a cracked or patched version (often called "Keygen" versions), this error usually means your patch failed. While the diagnostic steps below may help, counterfeit software is inherently unstable. For professional work, purchasing a license from Labcenter is the only permanent fix.
: Ensure your computer's date and time are correct. An incorrect system clock can cause valid licenses to appear "expired". Remove Old Versions This guide covers legitimate licensing issues
Under the tab, click Edit and ensure your user profile has Full control checked. For professional work, purchasing a license from Labcenter
(Start Menu → Labcenter Electronics → License Manager). Does it show ISIS Professional – Licensed ? If not → re‑import the key. Remove Old Versions Under the tab, click Edit
By following the guidance provided in this paper, users should be able to resolve the error and continue using ISIS Professional without interruption.
If you are still experiencing issues, consider the following: