Generally, Microsoft Licensed Class Manager is an ActiveX control that is installed with Internet Explorer.



To check if Microsoft Licensed Class Manager is installed in IE, please open the Manage Add-ons box that can be launched from menu Tools -> Internet Options -> Programs -> Manage add-on.



If Microsoft Licensed Class Manager is not installed, please follow the steps below to install the add-on.

1. Verify the following security settings of IE to "Prompt" or "Enabled":
    (1) Download signed ActiveX controls
    (2) Run ActiveX Controls and plug-ins
    (3) Script ActiveX controls marked safe for scripting
The dialog box of the security setting can be launched from menu Tools>Internet Options. Then select the security tab.

If you are using Windows Vista/7/2008, please try with the following steps.
    (1) Turn Protected Mode off. 
    (2) Add the website to the zone of trusted sites. 
    (3) To temporarily elevate permissions of IE: click Start, point to All Programs, right-click IE, and then select Run Elevated (with Administrator permissions).

2. Access the TWAIN related web page and you will be asked to download the add-on: 'Microsoft License Manager DLL'. Click to install the Add-on.