Uac ( hell :) with some files while it's disabled..

So I disabled uac for various reasons, like even not blocking erunt from accessing reg files & saving files .. .
& now I have a magic message when I open unregistered files, example "whatever.jpg" .. .

Message:
(full file address)
This application can't be activated when UAC is disabled.


Expected behaviour:

Choose default program "popup" .. .

Go to conrtol panel and set default programs to the desktop versions, e.g. photoviewer. Don't bother with the "app" things.

thanks siwi, but i can do better .. . using the open with option when I face that error .. .

but what i'd like is like in previous windows versions .. .

Auto "open with" window to popup
or
Nothing if I try to open an unregistered file .. .