Remove Send to Bluetooth from Office Addins:
(note: path may be vary)
regsvr32 /u "C:\Program Files\WIDCOMM\Bluetooth Software\syswow64\btsendto_office.dll"
(note: path may be vary)
regsvr32 /u "C:\Program Files\WIDCOMM\Bluetooth Software\syswow64\btsendto_office.dll"