I received an error message while upgrading my DirectX 9.c to DirectX10

Hi guys,
I received an error message while upgrading my DirectX 9.c to DirectX 10 for using PCSX2 on my operating system Windows XP Service Pack 3. It cannot trust a cabinet file.
Have you any idea for the error message?
Please help.
Thanks in advance.

A cabinet file necessary for installation cannot be trusted. Please verify the Cryptographic Services are enabled, and the cabinet file certificate is valid.
