Solution 1:
Add the following code to the form:
Private Sub WebBrowser1_DownloadBegin()
WebBrowser1.Silent = True
End Sub
Private Sub WebBrowser1_DownloadComplete()
WebBrowser1.Silent = True
End Sub
Solution 2:
Select the "Disable script debugging" check box to start IE, select the "Advanced" tab, and execute the "Tools → Internet Options" menu