I changed office 2013 to office 365, but if I try to change in the section Options -> Editor -> Spelling Hunspell Spell Checker to MS Word Spell Checker I receive an error message: Unable to select spell checker extension. Unable to cast COM object of type 'Micrsoft.Offic.Interop.Word.ApplicationClass' to interfacc type 'Microsoft. Office.Interop.Word._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID .... (Exception form HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)). I already tried to repair Trados but it did not help. The error message remains. Can someone help me?