Thursday, September 15, 2011

Office 2010 Installation Problem osetup.dll

While trying to install Office 2010 Pro we receive the following error immediately after running setup.exe "OSETUP.DLL digital signature does not validate or is not present".

Stpes that can be folowed:

Re-download from Microsoft ( x64 version)
Burn discs
Try different Computers comprising of Vista, XP, and W7
Copied files to network and to local PC

Run as local admin
Created a clean unpatched W7 install -
Created a clean unpatched XP wSP2 install -
Patched clean install of W7 - failed

re-download the ISO image from Microsoft licensing website and indeed the official ISO and its OSETUP.DLL was extracted without the Digital signature check and the installation cannot go further. Either from the ISO onto DVD or extracted to a folder(using ISO Extract tool), same issue.

To fix it, I had to search on my local computer for an existing OSETUP.DLL. I had one from Office 2007 setup. I found many versions on my computer in cache folders or installed version or temp files. Possibly some of them might do the job.

I had installed the temporary Certificate from Microsoft. Now, funny enough, each OSETUP.DLL file I check is "Signed". Would it be linked to a missed file association/version check that fails without the certificate installed (valid until march 2011)?



Digital signature of the file that works :

System Windows XP SP3.

Anti-virus Symantec V10 Corporate edition.

Name: osetup.dll

Thursday, 11 th of March 2010 08:46:08.

Size :5'789'544 bytes

File version :14.0.4755.1000

file Description : Office Setup Engine

Product name : Microsoft Office 2010

Product Version : 14.0.4755.1000

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