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Oscope Frequently Asked Questions

Question number FAQ-1041

If the license key is not recognized

Please reinstall the license key driver by following these steps.

  1. Download the latest license key driver (Sentinel Driver v7.6.1) from the address below to a suitable folder on your computer.
    The file to download is "Sentinel System Driver Installer 7.6.1.exe".

    THALS | Customer Support Portal Download Page (English) THALS | Customer Support Portal

    Sentinel System Driver 7.6.1 for Windows KB0016514
    Windows , 2.43 MB, Version 7.6.1, Released 2021-11-02

    "Click here to download file: DOW0002340"

  2. Once the file "Sentinel System Driver Installer 7.6.1.exe" is downloaded, extract the file.
  3. Remove the USB license key from your computer.

  4. Please run "Sentinel System Driver Installer 7.6.1.exe".

    During installation, select "Custom" for Setup Type and proceed with the installation. On the Custom Setup screen, install both the "Parallel Driver" and the "USB System Driver".

    If the maintenance menu (Modify, Repair, Remove) appears, select Remove to uninstall the driver, restart your computer, and then run the installer again.

  5. Please restart your computer after installation.
  6. Insert the USB license key and verify that the key is recognized.

Related FAQs Please also see here.


"ESUFEEL, which I installed on my Windows 10 PC, can no longer connect to my hardware after a Windows update. What should I do?"


"The USB Protect Key driver cannot be installed."


-->--> "After installing from a new CD-ROM, the protection key is not recognized."


"If the license key is not recognized"


-->--> "Windows 10 does not recognize the protection key, DS-0299 ONO-LINK2 (USB), or DS-0399 ONO-LINK3 (USB)."


Last updated: 2021-12-09