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I had an Office Standard 2010 installation which did not fully un-install at the first attempt. It's still in the list of installed programs, but some of the files and registry records might already be gone.

When I try to uninstall it, I now get the following error:

The language of this installation package is not supported by your system

I have already tried the suggestion at the How to uninstall or remove Microsoft Office 2010 suites article at Microsoft Support.

How can I get rid of that nuisance? In order to install a 64-bit Version I have to uninstall this one first.

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up vote 2 down vote accepted

Use the "Fix It" for Office 2010 provided by Microsoft here:

It'll take a while to run and won't provide much feedback during the process, but it should (might) remove all remnants of Office 2010. Be sure to reboot afterwards.

You could also try manually removing it following the instructions here:

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Thanks, unfortunately it failed. "An Error" occured. – artistoex May 25 '12 at 12:09
Have already tried as well – artistoex May 25 '12 at 12:14
Now I understand why not many such questions show up on superuser. Users just know what a mess this is and reinstall their whole system right away, which is what I am going to do next. – artistoex May 25 '12 at 12:17
Heh. Yeah, reinstalling is all you can do at this point. Good luck! – skrblr May 25 '12 at 12:43

I know this is an old question but I didn't see an answer. I used Geek Uninstaller and it worked like a charm. Uninstalled everything left by Office 2010, rebooted and installed Office again without issues.

enter image description here

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Got to mention that with only 'uninstall' you get the same error, 'force uninstall..' on the other side worked like a charm. +1 – Stefan Lobato Mar 11 at 15:50

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