Missing file for installation SQL 2008 R2

Hello,

I am trying to upgrade the SQL Server 2008 SP1 ro SQL 2008 R2 but it failed.

Your SQL 2008 R2 upgrade completed with failures
Source file not found: C:\Users\...\SQL 2008 R2 Ent Ed\x64\setup\sql_engine_core_inst_msi\PFiles\SqlServ\MSSQL.X\Binn\32veaiq8.mdf. Verify that the file exists and that you can access it.
Setup detected a non canonical discretionnary access control list (ACL) on directory 'C:\Program Files\Microsoft SQL Server\MSAS10_+50.MSSQLSERVER'. Please verify your security settings and make correction sif needed.

Any idea why the file is missing?

Thanks,
Dom

System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager