Hide Windows 7 Open File Security When Running Certain EXE File?

I am trying to build a simple AutoUpdate application using VB.NET. It was quite simple. That is, I put the newest ZIP file in my hosting site, and then download it using WebClient.DownloadFileAsync. After it get downloaded, I extract it using [URL]

But each time I run the unzip.exe using Process.start, Windows 7 always show Open File Security.

Is it possible for VB.NET to bypass such security restriction?

Btw, this is my code of using WebClient.DownloadFileAsync, in case any one google about it and landed on this page :

Public Class AutoUpdate
Dim installationFolder As String = "C:Program Filesxyzabc"
Dim updateFileNameTarget As String
Private Sub btnStartUpdte_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStartUpdte.Click

[Code]...