Secunia PSI showed me that my Skype was not up to date.
I downloaded Skype_18.104.22.168_SPS.exe.
Said it cannot install over existing installation.
I uninstall the existing one.
Comodo: need authorization to modify a COM interface. Allow.
That's it. No more dialogs. No errors. Nothing else happens.
Any ideas how I make it install? I've lost my Skype.
CANCEL the question.
I re-downloaded and it is a different file which DID work properly.
The place Secunial PSI sent me to for the upgrade install file was wrong.