knb43

I am trying to install GTA IV on my windows vista computer and a CRC Error pops up a lot during the installation. Then at the end it says Catastrophic error. I am able to install this same game on my brothers computer (with the same disc). i have caled rockstar and they told me to call SecuROM Support and they said it wasnt their problem. I really dont know what to do now, so any help will be greatly appreaciated!!!