Excuseme, I tried this solution but I has a problema after because the msn
close sesion frecuently, and is not posible desktop sharing.

Excuseme my poor English... Thank you for you help

"Andre Da Costa [Extended64]" wrote:
[color=blue]
> Try disabling UAC then install Windows Messenger, click Start > All Programs[color=green]
> > Accessories > Run > type in MSCONFIG > OK > Tools (tab) > scroll down >[/color]
> select "Disable UAP" > Launch > close command prompt > restart system and
> try the install again.
> --
> --
> Andre
> Windows Connected | [url]http://www.windowsconnected.com[/url]
> Extended64 | [url]http://www.extended64.com[/url]
> Blog | [url]http://www.extended64.com/blogs/andre[/url]
> [url]http://spaces.msn.com/members/adacosta[/url]
>
> "Rig" <Rig@discussions.microsoft.com> wrote in message
> news:7169942A-3B6D-47F0-9617-4C2317BCF0A3@microsoft.com...[color=green]
> > I'm running Vista Beta 2 Build 5384 and I'm unable to install Windows
> > Messenger (not to be confused with MSN Messenger or Windows Live
> > Messenger)
> > I've attempted to install Windows Messenger 5.1 (5.1.0639) and Windows
> > Messenger 5.1 (5.1.0701) and they both display the same error message.
> >
> > If I start the installer and get the welcome screen, I click Next, I then
> > accept the EULA after a few seconds Windows Vista's User Account Control
> > (UAC) pops up asking if I wish to Canel or Allow this application to
> > access
> > my computer, so I click on Allow.
> >
> > Next I get the message "Windows Messenger 5.1 was not installed - This
> > installation was interrupted. No changes were made to your computer
> > system.
> > Please try running this installation again"
> > If I retry the install I get the exact same error.
> >
> > I need to be able to use Windows Messenger, as opposed to MSN Messenger or
> > Windows Live Messenger due to the ability of Windows Messenger allowing me
> > to
> > use the Exchange Server as an IM server and thus communicate with other
> > members of our company.[/color]
>
>
>[/color]