SQL Server 2008, RTM, X64 on Server 2008 x64 fails install

I'm trying to do a full install of SQL 2008 enterprise on Windows Server 2008
enterprise SP1. The setup program has performed all the necessary
pre-requisite installs and upgrades and I'm able to start the setup program.
Very quickly I get the following error:

Error writing to file: Microsoft.AnalysisServices.AdomdClient.dll verify
that you have access to that directory.

it doesn't actually say what directory?

The log file (sql_common_core_Cpu64_1.log) shows the following entries at
failure;
MSI (s) (20:B8) [22:30:31:895]: Note: 1: 1305 2:
E:\x64\setup\sql_common_core_msi\Windows\Gac\wsef9rl7.dll 3: 1
MSI (s) (20:B8) [22:30:31:895]: Note: 1: 1310 2: 80 3:
Microsoft.AnalysisServices.AdomdClient.dll
MSI (s) (20:B8) [22:32:14:777]: Product: Microsoft SQL Server 2008 Common
Files -- Error 1310. Error writing to file:
Microsoft.AnalysisServices.AdomdClient.dll. System error 80. Verify that
you have access to that directory.

MSI (s) (20:B8) [22:32:14:777]: Note: 1: 1310 2: 80 3:
Microsoft.AnalysisServices.AdomdClient.dll
Error 1310. Error writing to file:
Microsoft.AnalysisServices.AdomdClient.dll. System error 80. Verify that
you have access to that directory.
MSI (s) (20:B8) [22:32:16:009]: Product: Microsoft SQL Server 2008 Common
Files -- Error 1310. Error writing to file:
Microsoft.AnalysisServices.AdomdClient.dll. System error 80. Verify that
you have access to that directory.

I'm trying to do this install using a remote console, might that be the
problem?

Thanks for your help
steve