Complain about install opera and skype error code 1603

Franca

New Email
I download opera mini and after which it has finished downloading and double click on it and it says opera: Error Non 7z archive. So what Can I do to install the opera.

Another Complain again is my Skype after downloading it, it will say installing Skype failed; code 1603
a fatal error occurred during installation
So what do I do now in other to install it.
 
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