cool. I'll see what they say

it seems that way to me.

how to fix? should I be asking Microsoft?

Control Panel > Default Browser exists but will not open when clicked. context menu Open/Open In New Window also not working.

possibly linked to the error I received?

then it was installed for all users. Opera was previously set as default browser

not 100% sure but I believe it was a standalone install.

attempted to do the above, received the following error:

windows cannot find '::{26EE0668-A00A-44D7-9371-BEB064C98683}\0::{17CD9488-1228-4B2F88CE-4...\pageFileAssoc'

on Windows 7 / 32 bit

I already had Opera set as my default browser, it was working fine.

now, when Opera starts, I get the message "would you like to make Opera your default browser? Yes/No, don't ask again"
I click Yes, but I still get the message next time I open Opera

I go to Settings and attempt to manually set Opera as default browser, but clicking the button does nothing

why would this issue randomly appear? how can I fix this?