I installed and have been using MS Office 2010 trial version on my PC, Win 7, Home, 32 bit. I am using it to convert a 2007 PPT presentation to a wmv file format.
I had one successful 'save as' conversion to the wmv format but wanted to adjust some audio timings that the process did not pick up. Now when attempting to save after editing a copy of the pptx I kept getting the message that "PowerPoint found an error that it can't correct" and then I couldn't save the changes to any format.
I had been advised to run a 'repair' within the "programs (uninstall/change/repair)" folder and got the error 2203. I still have Office and PPT 2007 installed.