Frame set association problems in opening files

Hello,
I don’t know why these files are not associated with a program. I did the settings in control panel and is not working. I have to do this every time I open my PC. Any solution ? Why I have to repeat the settings every time ?
Thank you !

Notes:///86256659004D7345/MailFS?OpenFrameset
This file does not have a program associated with it for performing this action. Create an association in the Set Association control panel.
OK
