You have downloaded and installed Java, which is needed for Online Product Key activation in Sentinel EMS Customer Portal. Now you have to make sure it is enabled in your web browser. If you are using Mozilla Firefox, follow the instructions below.
1. Select which browser installation(s) on your computer should use the latest Java version you installed. For this, open the Start menu, then open All Programs (on Windows 7) or All apps (on Windows 10).
2. Find Java (either Java (32-bit) or Java (64-bit)). Click on it in order to open the Java Control Panel.
3. Open the Advanced tab. Scroll to the Default Java for browsers section, and make certain that each checkbox is checked.
4. Go to the Security tab. In the Exception Site List section, add the addresses of your Customer Portal (the Edit Site List button):