I have the trial version of windows office 2003. Do I have to remove it before installing windows office 2003 pro|||You shouldn't have to. In fact, it should prompt you that you have a trial and ask if you want to upgrade. However, I always remove an older product, before installing or upgrading a new version. When you uninstalling the first version, I recommend that you reboot before installing the new version.|||no, for just downloading office 2003 professiional you have't to uninstall office 2003 standard ,but when you will install office 2003 professional then your office 2003 standard will be overwritten or upgraded to office 2003 pro as it's the more premium and the latest version than your earlier office 2003.

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