During this days I had following problem.
Office 2013 Professional in OEM version stop to work.
I tried to full repair Office but it suddenly stop with error.
I decided to download it from Microsoft Download Page (it ask you office 2013 serial Number)
http://office.microsoft.com/en-us/products/get-office-oem-download-page-FX103849951.aspx
Executing relative application it give us following error:
Windows 7 64bit Reinstalling 32bit Office Professional - Setup could not find any available products to install. please contact your system administrator
http://answers.microsoft.com/en-us/office/forum/office_2013_release-office_install/windows-7-64bit-reinstalling-32bit-office/3d953a18-340b-435e-a158-43da5cb04741
The problem was that during repair procedure Office 2013 doesn't uninstalled correctely and we needed to excetue this Fix It program that Microsoft released for this kind of problem:
http://support.microsoft.com/kb/2739501