Removing old read only password protection from an excel file

[geewhysee]

I have an old file that is in .xls format. When I open it I receive this message

Which is fine because I have the password. When I try to remove the password I go to info to choose protect workbook but there is not a password listed and in fact it allows me to create a new password, if I do then on reopening the file it asks for both the old password and the new one.

What am I missing?

 

[Scott T]

Maybe the file has a password to open or modify. In the save as box click on tools and select general options and see if there is a password listed.