Error” This operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator.”


  • Open Control Panel
  • Open Default Programs
  • Click “Custom” and then Default Browser
  • Set Internet Explorer as the default browser
  • Click “OK”

    Other options you can try:

    • Change the Default key value in Registry.
    • Open HKLM\Software\Classes\.html
    • The Default value of this registry should be “htmlfile” .
    • We can manually change this value. There is another way to change this value.
    • Click on Start >Programs >Default Programs.
    • Click on “Set program access and computer defaults”.
    • Under Choose a configuration , Click on “Custom” option.
    • In “Choose a default web browser” click on “Internet explorer” and click on OK.
    • Now close your IE and Outlook if they are open. Then open Outlook again to test.


    • Check for permissions of following registry keys.
      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0 and check “full control”.


    • Try to repair Office installation. Restart computer. Open word and type/click a URL.


    • Reset Internet Explorer Settings in IE7.0
    • In Internet Explorer, click Tools menu > Internet Options.
    • Click Programs tab, click “Make Default” and check “Tell me if Internet Explorer is not the default web browser.”
    • Switch to Advanced tab, click Reset button and then click Reset to confirm.
    • Uncheck the “Enable third-party browser extensions” option in the Settings box.


    • Reregister Urlmon.dll
    • Quit all programs that are running.
    • Click Start, and then click Run.
    • In the Open box, type “regsvr32 urlmon.dll” (without the quotation marks), and then click OK. The following message appears:
    • DllRegisterServer in urlmon.dll succeeded.
    • Click OK.


    • Edit URL protocol file types.
    • Open Control Panel | Default Programs.
    • Click “Associate a file type or protocol with a program”
    • In the Name column, find the HTTP (URL: HyperText Transfer Protocol ) item and click Change Program to make sure IE is selected.
    • Save these settings, and then repeat the process for other URL protocol file types.
      FTP (URL: File Transfer Protocol)
      HTTPS (URL: HyperText Transfer Protocol with Privacy).

    Hope this helps.

    – Thanks, Jinesh.