Have you tried downloading a fresh copy to make sure that your download was
not corrupt or otherwise damaged?

--
Richard G. Harper [MVP Shell/User] [email]rgharper******.com[/email]
* NEW! Catch my blog ... [url]http://msmvps.com/blogs/rgharper/[/url]
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"khaled" <khaled-elashry@nileprojects.com> wrote in message
news:%23HrOoV1rIHA.1952@TK2MSFTNGP05.phx.gbl...[color=blue]
> hello
>
> when tring to install SQL server Managment Studio Express on windows vista
> i
> got the following message :
>
> [ Windows Installer
> This installation package could not be opened. contact the application
> vendor to verify that this is a valid windows installer package ]
>
>
> any help please.
>
> Thanks.
>
>[/color]