Installing an Endpoint Security client on Windows with active UAC (User Access Control) requires the user to invoke the installer with the "Run as Administrator" option.

Follow these steps to add "Run as administrator" to the context menu (right mouse click) of MSI files, so that the user could install Endpoint Security Client with administrator privileges:

1. Open a plain text editor (e.g., Notepad, Notepad++. etc).

2. Copy the following content to the text editor:

   Windows Registry Editor Version 5.00
   
   [HKEY_CLASSES_ROOT\Msi.Package\shell\runas\command]
   @=hex(2):22,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,\
   00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,6d,00,\
   73,00,69,00,65,00,78,00,65,00,63,00,2e,00,65,00,78,00,65,00,22,00,20,00,2f,\
   00,69,00,20,00,22,00,25,00,31,00,22,00,20,00,25,00,2a,00,00,00

3. Save the text file content as RunAsAdminMSI.reg

4. Double-click on the RunAsAdminMSI.reg file (to run it) - confirm when prompted.

5. Right-click on the MSI file - the "Run as administrator" option should appear in the context menu: