Windows Username/Password Prompt when opening a file

[DotNetDunce]

Hopefully, someone out there can give me an idea of where to look for this problem. I have a web site where the search option brings up a list of documents that meet the search criteria. If it is a text file or Word document it opens fine, but if it is a .xls file or a .ppt file, it throws up the Windows username/password prompt. If you click cancel, it goes away and opens the file. Does anyone know what might cause this?

Thanks in advance!

 

[xwb]

Check on Tools/Protection in Excel. That's where it asks for passwords.

 

[DotNetDunce]

Thanks for the suggestion! I checked that and there is nothing set there that asks for a password. As I mentioned before, if you click cancel on the prompt it goes away and then opens the file anyway.

Judging from posts to other threads, could it be something in IIS? Any other suggestions?

Thank you!