I'm trying to Install SQL Server 2012 Developer Edition onto my Desktop I currently have Express Edition, I run the Install stages fine but as soon as I get to a certain part of the installation I receive this error: TITLE: Microsoft SQL Server 2012 Service Pack 1 Setup
Error reading from file D:\x86\setup\sql_engine_core_inst_msi\PFiles\SqlServr\MSSQL.X\MSSQL\Binn\hadrres.dll. Verify that the file exists and that you can access it.
The file does exist within its location and I can't really see the problem here :( Can anyone help ?