Disable Sent to menu
Open up regedit.exe through the start menu search or run box, and then navigate down to the following key:
HKEY_CLASSES_ROOT\AllFilesystemObjects\shellex\ContextMenuHandlers\Send To
Find the (Default) value on the left, double-click on it and remove the text from the value, leaving it blank. The change will be immediate.
Restore Send To Menu
Change the value of the registry key back to this:
{7BA4C740-9E81-11CF-99D3-00AA004AE837}