I have noticed something strange on my Windows 10 PC and I’m wondering if someone can explain.


When I select Properties > Change on a .jpg or .png file and view the list of available applications, there is an application labeled “%1” (double quotes included).

This option is not listed for .pdf, .docx, .mp4, .pptx, or any other non-picture file types that I have checked. However, I have not checked .gif or other file types.

I have searched for this application in my system files and have not been able to find it. This option is also not available in the regular “Open With…” list; it only appears in the “Change” list. I have not tried to open any file with this application because I am not sure what it is and do not want to risk any harm to my system.

Can anyone explain what this is, how to prevent it, or provide further details about what it might be?

Askify Moderator Edited question May 4, 2023