I've run into this problem. Trying to install Office Professional Plus 2013 on my upgraded Win 8 Pro. I uninstalled Office 2010 before trying to install Office Professional Plus 2013. However, the setup bombs out when it gives the following:
Setup cannot find Proofing.en-us\Proof.en\Proof.cab. Browse to a valid installation source and then click OK.
I did a search for this file and initially did not find it. Then from the ISO image copied it manually to where I had expanded my office setup files. Still shows up as "Invalid Location".
Note, I downloaded the software from my technet subscription so I should not be having a beta copy. Both the proof.cab and proof.msi files are there along with some other files. I'm totally stuck. Any help will be appreciated.
I had this happen too when I tried to install the "<label class="description" id="description1">Office Professional Plus 2013 (x64) - DVD (English)</label>" version. I then tried the "<label class="description" id="description0">Office Professional Plus 2013 (x86 and x64) - DVD (English)" version instead and it worked fine.</label>
For future searchers - just had this happen on 2010 and found this which worked:
- Proposed as answer by NinjaDynamo Tuesday, April 16, 2013 7:50 PM