Hello, I am trying to install Windows 7 on my MacBook Pro (2009, 10.8.4), however, I am running into a problem after using Boot Camp to set up the partition and download the support drivers. After Boot Camp asks me to insert the Windows 7 installation disc, my computer restarts and the Windows 7 installation guide comes up. I am able to start the installation process by selecting the Windows partition and letting the installer format it using the NTFS file system. However, after I click "next" and the installation process continues, it almost immediately freezes at the "expanding windows" step, not progressing beyond 0%. I have let it sit at this step for over an hour with no progress. I can hear the optical drive running and it sounds like it is repeatedly trying to read the disc unsuccessfully. The disc does not appear to be scratched and it is a legitimate Windows 7 Home Premium OEM System Builder Pack 1 version with the product key. Can anyone help me figure out what is wrong? Would it work better if I burned a copy of the installation DVD as an ISO file to my usb drive? If so, please tell me how to do that since my Boot Camp does not include the usb option. Thank you!