open .gif with Windows Picture and Fax viewer

[DukeSucks]

When I receive a picture in the .jpg format in an email, it opens in the default program of Windows Picture and Fax Viewer. When it is in .gif format, somehow the default got changed to internet explorer.

I want .gif to open with Picture Viewer. I know how to change the program it opens with, but cannot find where Picture Viewer is located. Any help to where it is?

I use XP, firefox, and yahoo mail.

Thanks for your help.