When I try to install the hotfix for CRM to work on XP SP2 it said "the data
is invalid" and does not install.

I am talking about the "CRM1.2-KB870635-Client" hotfix. I downloaded again
from Microsoft's site but that didn't help either.

I tried this on an XP SP2 and 2003 SP1 both didn't work.

I cant install "Sales for Outlook" on these systems either.

Does anyone have an Idea?

Thanks.