HKEY_LOCAL_MACHINE\Software\Microsoft\ Office11.0Ĥ. HKEY_CURRENT_USER\Software\Microsoft\ Office11.0 (or 12.0) Go to Start Menu > Run (or Windows + R from your keyboard) Now back to the registry editing, use regedit to check the registry entry of previous MS Office versions:ġ. If you simply install without checking the registry, you may encounter the following error:Ī required installation file CS561404.CAB could not be found So, if you’re downgrading MS Office after past installation, you need to check whether the registry is still kept in your machine. In case of reinstallation, it might violate the original purpose of the license hence Microsoft keeps the registry after the uninstallation process. The reason is, MS Office is shipped as OEM (Original Equipment Manufacturer) whereas it should be installed on a single computer for a single license (or as what the license says). Eventhough the installer removes MS Office 2007 files from your system, it still retains the registry. Next, you can not simply install MS Office 2003 after the installation. The uninstallation should be simple and it should bring you no problem at all. Simply click Default Programs menu from your Startup Menus and find the link to the list of installed programs. What you need to do first is to uninstall MS Office 2007. If you are in this circumstance and still face difficulty during the installation, I recommend you to read the rest of this article. As we know, MS Office 2007 uses the new open XML document format so that the default filetype name for the document will contain ‘x’ as the suffix (eg. There is another circumstance, anyway, where you simply want to get rid of your Office 2007 and replace it with Office 2003 so that you can still exchange documents with your colleagues since they haven’t bought their copy of MS Office 2007. In case you want to install MS Office XP, 2003, and 2007 on the same machine, you should install MS Office XP first followed by Office 2003 and Office Suite 2007 respectively. The gist of the article is to install MS Office in subsequent order from the oldest to the newer one. Microsoft have already written technical explanation on how to achieve this. For example, you want to install MS Office 2003 along with the newer Windows 2007. First is if you want to install several versions of MS Office on the same system. There are some occasions for the installation to take place. However some Vista users may experience difficulties during the installation and need to resort for solution that works on their operating system. If you’re Windows XP user, the downgrade process should go smoothly without staggering problem. This might be an old trick but i hope it will still help some people who failed their effort installing MS Office 2003 on Windows Vista.įor some reasons, MS Office 2007 might not suit you so that you decide to downgrade, uninstall MS Office 2007 and revert back to MS Office 2003.
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