I have some vbscript code as below:

Set WshShell = CreateObject("WScript.Shell")
Set IE = CreateObject("InternetExplorer.Application")
IE.Navigate ("http://URLOnMyIntranet//?cid=6&c=12&cpc=dt2wJiVUfnQ2")
IE.Visible = True
WshShell.AppActivate(IE)
IE.Quit

When I run it, I got “Interface is Unknown” error for the last line. Did some googling and found the solution is to run command prompt as administrator and then run the vbscript from it.
It did waste me some time before I did some google search.