Finally got round this. It turned out that what was blocking it was the failure of the Native Client to install, not the hardware warning. This part was failing because...

I didn't find any log files in temp - the logs in C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files don't reveal anything obvious. The summary.txt file says "The current system does not...

Thanks, but I went through that yesterday and have freed up about 25 GB of disk. Prior to that it was not as much, but still measured in GB rather...