I still have the original disc version of Diablo 2 and Lord of Destruction. Since my new computer has no disc drive anymore, I looked up if I could add the CD key to my Blizzard account and I found a way to do it from the account page. Now I can download an installer that installs the game but if I try to run it, Windows says it blocked the app because it is unsecure (or a virus?).
What can I do now?