Error Code 1608 this time?

Hi,
When I tried to install my SQL Server 2008 R2 I get the following message:
MsiGetProductInfo failed to retrieve ProductVersion for package with Product Code = '{AEB9948B-4FF2-47C9-990E-47014492A0FE}'. Error code: 1608.
Any ideas how to get around this? Appreciate any idea.
