A COM object of type ' Microsoft.Office.Interop.Word.ApplicationClass cannot be cast to an interface type ' Microsoft.office.interop.word._ Application ".

Operating system WINDOWS7

Previously loaded 2003, loaded 2007, loaded 2010, installed WPS.

Convert Word to PDF, can not be converted, there is no special hint, the internet looked under, some people say it is not installed this thing

Http://download.microsoft.com/download/3/8/8/388812b2-0d3f-474e-a7ef-b095d3d0d3cd/SaveAsPDF.exe

Put the above all unloaded, loaded on 2007, there appeared the following in the problem

A COM object of type ' Microsoft.Office.Interop.Word.ApplicationClass cannot be cast to an interface type ' Microsoft.office.interop.word._ Application ". This operation failed because the COM component call to the interface of the IID "{00020970-0000-0000-c000-000000000046}" QueryInterface failed because of the following error: not found. (Exceptions are from hresult:0x80030002 (Stg_e_filenotfound)).

Looked at the various methods on the Internet, modified the

Hkey_local_machine\software\classes\interface\{00020970-0000-0000-c000-000000000046}\typelib
Default key value pointing to {00020905-0000-4B30-A977-D214852036FF}

Or not.

Then directly installed on the WPS ... You can have it.

To unload the WPS. To uninstall via WPS's own uninstallation

A COM object of type ' Microsoft.Office.Interop.Word.ApplicationClass cannot be cast to an interface type ' Microsoft.office.interop.word._ Application ".