Introducing Google Drive plug-in for Microsoft Office - GOOGLEDRIVE.BLOGSPOT.CO.UK
Using the new Google Drive plug-in, people using Office for Windows can now open their Word, Excel and PowerPoint documents stored in Drive, then save any changes back to Drive once they’re done.
DOWNLOAD PLUG-IN
Using the new Google Drive plug-in, people using Office for Windows can now open their Word, Excel and PowerPoint documents stored in Drive, then save any changes back to Drive once they’re done.

DOWNLOAD PLUG-IN