I have an error where saying "This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer package." My exact problem is at this link.. http://support.microsoft.com/default.aspx?scid=kb;en-us;316309 I did what they told me to do.. Install sp1... I did and it didnt help.. Only specfic installations have this error. I tried reformatting to resolve, still no luck! I need to install somethings!.. Please help..