Hi, I installed a trial of WebCore with Delphi XE7, but my antivirus "Microsoft security essentials" deletes the file Webrunner.exe recognizing it as Troian Win32 / Zpevdo.A, how can I solve it?

There appears indeed to be (again) a false positive from Defender. So, we will submit the file (again) to Microsoft to ask to clean up this false positive from their Defender virus pattern database.
Meanwhile, tell Defender to ignore this.