this "res" that its referring to sounds like a file ending that it doesnt recognize so it doesnt know how to open it, like an .exe is an executable or a .pdf is opened by your reader program, or a .jpeg is opened by the program you have set to open pictures........does the file youre attempting to open have .res on the end of it?  Im wondering if that means it was "restored" somehow.  (but unless youve got your system set to see the file endings, you probably cant even answer that question)

Did you uninstall the Proseries programs you had that were screwed up by the power surge, reboot the computer, then redownload/install fresh copies of the program from your Intuit account? That would be the order of events I would have followed.

This sounds like a Windows issue in that it doesnt know how to open the file that youre using to open ProSeries, whether thats a Windows issue or a Proseries installation snafu, without being there seeing whats happening, I can't tell you.....I do the majority of my own IT, but this situation Id probably call in my guy that does this kinda stuff for a living.