Vista - Vista and Office 7 Pro Can not read MDI files

Hi, I used to save lots of files by printing to .mdi including some serial numbers for programs I purchased. I have am MDI file from probably an XP installation some time ago and if I try to open it, it asks what format. Starting with Windows, it comes out as gibberish or programming language and I simply can not read it.

I do have Microsoft Document Image installed, and I have tried to do Repail on my office installation but for some reason I can not open these files I saved or printed as .MDI files.

Can anyone please help ?

Thanks in advance!

Since I wrote this, I rebooted my computer and it worked. I am not yet satisfied this was a one time glitch however and there are other files I will need to test. It also reported one corrupted which is not now. If anyone still has information helpful to insure in the future I will not have problems with MDI files I would really appreciate it. I supposed I should try to find what I can and what will open and maybe save them as Adobe, or .xps, or text depending on what it will allow, I am not confident of the future of MDI support, but if I am wrong someone please correct me of if anyone can add anything about this issue.

Thanks again!