While installing AutoCAD 2012 I received an error message.

Hi,
While installing AutoCAD 2012 I received an error message. The screenshot of the error message is as under.
It stopped installation throwing this error message all on a sudden. As per direction of the error message, I tried to deleteProductInformation.pit from the respective directory but failed.
Have you any idea for the issue?
How can I install AutoCAD now?
Please help.
Thanks in advance.

AutoCAD 2012
1:5 2;adlmPITSetProductInformation failed.3:2
