Download Second Life update

Today’s the first time I’ve tried to go on Second Life since 14 June so, of course, I get the message that I need to download a new version of Second Life. And the installer fails:

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Error
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The Second Life auto-update has failed.
The problem may be caused by other software installed
on your computer, such as a firewall.
Please visit http://secondlife.com/download/
to download the latest version of Second Life.