My office machine has been replaced as the lease expired, they do that by issuing machines on the current lease, previously used by someone else. So I am on the same Windows 7 64bit Pro, running IE 11 and MS Office 2010. None of that changed.
Previously I was able to click on a Word or Excel document in Sharepoint, and it would open after asking Read Only/Edit. But on the new machine I get a windows credentials prompt (the same as when opening Sharepoint site) and the following "warning" and the document does not open.
What can be different between the old and new machines which is causing an authentication challenge and the error opening files?
The local admin suggested downloading each and every file, which would be a RPITA.
This only happens to the Office files, PDFs for instance open just fine w/o credentials prompt.