Some or all identity references could not be translated.

Hi,

When attempting to install a new instance of Sql Server Express 2008 R2 on Windows Server 2008 R2, I'm receiving the below error:

I dont know if this is important but I installed SQL server a couple of months ago and a couple of weeks ago I upgraded the server to be a domain controller. This Morning I've had to manually create two security groups in AD to resolve another installation error. I created two groups as shown below to resolve the issue:

SQLServer2008SQLBrowserUser${ServerName}
SQLServer2005SQLBrowserUser${ServerName}

Does anybody have any information on how I can resolve the new issue regarding "some or all identity references could not be translated"?

Many Thanks,

James Bratley