When I try to install Windows Live Messenger, the following message appears :
"Unable to install Service Messenger Sharing USN Journal Reader (usnsvc)"
and program ask me to verify that I have suffisant privileges to install
system services.
I am administrator of my computer and I try to run setup as administrator
with the same result.
Note that I have an "access denied" message when I try to install Acrobat
Reader ...

"Olivier SG" wrote:
[color=blue]
> When I try to install Windows Live Messenger, the following message appears :
> "Unable to install Service Messenger Sharing USN Journal Reader (usnsvc)"
> and program ask me to verify that I have suffisant privileges to install
> system services.
> I am administrator of my computer and I try to run setup as administrator
> with the same result.[/color]

I have installed Live Messenger using a Standard account without problems.

Thank you Bill for your great help !
I finally found the problem.
I had to disable McAfee VirusScan 8.5 beta 3 before installing different
component.

"BillD" wrote:
[color=blue]
>
>
> "Olivier SG" wrote:
>[color=green]
> > When I try to install Windows Live Messenger, the following message appears :
> > "Unable to install Service Messenger Sharing USN Journal Reader (usnsvc)"
> > and program ask me to verify that I have suffisant privileges to install
> > system services.
> > I am administrator of my computer and I try to run setup as administrator
> > with the same result.[/color]
>
> I have installed Live Messenger using a Standard account without problems.[/color]