Outlook error- This operation has been cancelled due to restrictions in effect on this computer, please contact your system administrator.

This section is intended for advanced computer users. For help with advanced troubleshooting, ask your system administrator or contact Microsoft Support.

Note Use this method only if the earlier instructions for each browser do not work to resolve this problem. Export the registry key from another computer

1    Click Start, and then click Run.
2   In the Open box, type regedit, and then click OK.
3    Locate, and then click the following registry subkey:
4    HKEY_LOCAL_MACHINE\Software\Classes\htmlfile\shell\open\command
5    On the File or Registry menu (depending on your operating system), click Export.
6    Note the location where the file will be saved. The registry file can be saved directly to the hard disk or floppy disk.
7    Type a unique file name, and then click Save.
8    Exit Registry Editor.

Import the registry key

    Copy the exported registry key to the desktop on the problem computer.
    Double-click the .reg file.

    You receive the following message:

    Windows 7 - Are you sure you want to add the information in drive: location file was copied to\file name.reg to the registry?

    Windows 8 - Adding information can unintentionally change or delete values and cause components to stop working correctly. If you do not trust the source of this information in C:Users\<yourlogon>Desktop\regkey.reg, do not add it to the registry.
    Click Yes, and then click OK.

Verify that the String (Default) value of the "HKEY_CLASSES_ROOT \.html" key is "htmlfile"

    Click Start, and then click Run.
    In the Open box, type regedit, and then click OK.
    Locate, and then click the following registry subkey:
    HKEY_CLASSES_ROOT \.html
    Make sure that the value of the String (Default) is "htmlfile". If it's not "htmlfile", right-click (Default), click Modify, input htmlfile in the Value data box, and then click OK.
    Exit Registry Editor.