Is the file it is hanging displayed and if so what is it, file name and location ?
Is that the file you are trying to open ?
Did you try what Tech suggested in his first reply, "You can disable the scanning while opening files..." Temp disable that and see if it loads as normal and see if there are any other files being scanned on loading.
Sorry I'm clutching at straws here as I haven't seen this on the forums before and I still use Office 97 I never saw a need to upgrade.