So I work in the IT department for a company and one of the clients (we will call Bob), is having issues with Excel. There was a spreadsheet sent around the company with links to files on the server. Nobody had a problem with them at all. Bob opened a bunch completely fine but there were a few that opened up in Wordpad instead of Word. It looked as if the extensions were .docx. If I remember correctly, the .doc files opened in Word as they should. It's not super important because when it opens in Wordpad, everything is still legible and the format is basically the same. I just don't want this being an issue down the road where it escalates to where he is not able to open the files at all. I looked at the default programs and everything looked to be correct in there. I even uninstalled Office, ran Ccleaner (cleaner and registry), and reinstalled Office and that didn't work.
Windows 7 Pro 64 bit
Office 2010 Professional Plus
If any more information is needed, let me know.