Windows 7 refusing to boot unless DVD is in the drive

Some people have problems where their computuer won't boot into Windows 7 unless the installation DVD is in the DVD drive. Try this:
1. Boot from the Windows 7 DVD.
2. Click Next and then click the "Repair your computer" link.
3. In the System Recovery Options menu, select "Command Prompt."
4. Type Bcdedit /export C:\BCD_Backup
5. Press Enter.
6. Type ren c:\boot\bcd bcd.old
7. Press Enter.
8. Type Bootrec /rebuildbcd
9. Press Enter.
10. Close the command window and reboot the computer.

Note: Check your BIOS settings and ensure that the boot device is set to be the hard drive.