Do NOT use Electrum wallet unless you properly know how to verify the program . Electrum is the wallet that is targeted the most by malware/viruses.
Lot's of people lost their coins already like this.
This isn't just applicable for electrum, you should not use any wallet if you don't have proper knowledge about it. So electrum isn't different and you should know how to verify it before use. I know electrum attack was pretty much confusing. But I think it was lesson for others that we should not just update software from popups without verification from websites. Most of peoples using electrum because its pretty much easier. And of course everyone should verify that he is using original software.