I spent the whole last night fixing installation problem with my Microsoft Office 2007 installation on Windows Vista. It really drove me crazy. Each time I tried to re-install Office 2007, I got the following error message:

Error 2203. An internal error has occured. (C:\Windows\Installer\de507.ipi -2147287035) Contact Microsoft Product Services (PSS) for assistance. For information about how to contact PSS, see C:\…\PSS10R.CHM

Installation Error on Microsoft Office 2007

This is a really stupid error message. I couldn’t find PSS10R.CHM file on my file system. So, how could I contact Microsoft Product Support Services? Is it a joke?

After spending hours, I gave up. As usual, when I hit a problem, I always googled it. I found some pages that discuss the same error. One of them is from Microsoft Support. It was completely useless. The solution described there didn’t help me at all.

After browsing to some other pages, I found one useful page at TechArena Forum. There was a guy from Microsoft Online Partner Support who provides very useful information. Thanks Leon for providing the hint!

My problem was solved by running Windows Installer Cleanup utility and remove all Office 2007 files and registry.