Missing Sharing Tab in Folder Properties on Windows 7

Sometimes the “Sharing” tab in the folder properties goes missing. If that is the case and you right-click a folder and select “Properties”, it looks like this:

This is what is should look like:

Causes

Here are the reasons I know of why the sharing tab might be missing.

Missing Registration

The following registry value is missing:

Key: HKEY_CLASSES_ROOT\Directory\shellex\PropertySheetHandlers\Sharing
Value: (Default)
Data: {f81e9010-6ea4-11ce-a7ff-00aa003ca9f6}
Type: REG_SZ

Missing Group Membership

The user account is not a member of the local group “Users”, only of “Administrators” or “Power Users”.

Others

If you know another reason, let me know by commenting below.