Damn, thank you both for making me aware of the issue. These scams are getting harder and harder to identify. Is deleting the fake one and re-downloading the real one enough or should I take extra measures to insure everything is legitimate?
I think that best you can do is to format your disk ( save what is important to you ), and install clean OS. Even if you remove fake wallet it may install some extra malicious software which can stay undetected and hit you again.
I am not 100% sure, but when this phishing attack start some user is report that after removing fake wallet and download legit one, he still see that fake wallet. Only way to remove it would be to delete all traces / files that stay in AppData/Electrum folder and registry.