SQL Setup error

Hello,

I am trying to install SQL 2008 SP1 and I am getting an error during the setup:

Description:
  SQL Server 2008 Setup has encountered an error. 
Problem signature:
  Problem Event Name:	SQL100MSI
  Problem Signature 01:	10.0.2531.0
  Problem Signature 02:	12.0.6015.5000
  Problem Signature 03:	dw20sharedamd64.msi
  Problem Signature 04:	0x162A16FE
  Problem Signature 05:	0x1603
  Problem Signature 06:	Install_WatsonX64
  OS Version:	6.0.6002.2.2.0.272.7
  Locale ID:	1033
Additional information about the problem:
  LCID:	1033
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any idea?

Thanks

Dom

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