I have my PC setup so that png files are associated with Windows Picture &
Fax Viewer. If I double click on a png file in Windows Explorer, then WP&FV
opens and the picture displays. That's what I want.

If I put a hyperlink in Excel to the same file and click on it, then XL
tries to open the file in Internet Explorer which is not what I want. Can
anyone help with how to change that so it opens in WP&FV.

many thanks