Fixed.
Method 8: Use the Diskpart.exe utility to clean the disk, and then run Windows Vista Setup again
If you have tried all the methods that are listed in this section and the problem persists, use the Diskpart.exe utility to clean the disk, and then run Windows Vista Setup again.
Note Use this method only if you want to perform a clean installation of Windows Vista. When you clean the hard disk, it is formatted. All partitions and all data on the hard disk are permanently removed. We strongly recommend that you back up the files on the hard disk before you clean the disk.
To use the Diskpart.exe utility to clean the hard disk, follow these steps:
1. Insert the DVD into the DVD drive.
2. On the disk selection screen, press SHIFT+F10. A Command Prompt window opens.
3. Type diskpart, and then press ENTER to open the diskpart tool.
4. Type list disk, and then press ENTER. A list of available hard disks is displayed.
5. Type sel disk number, and then press ENTER. number is the number of the hard disk that you want to clean. The hard disk is now selected.
6. Type det disk, and then press ENTER. A list of partitions on the hard disk is displayed. Use this information to verify that the correct disk is selected.
7. Make sure that the disk does not contain required data, type clean all, and then press ENTER to clean the disk. All the partitions and all the data on the disk is permanently removed.
8. Type exit, and then press ENTER to close the diskpart tool.
9. Close the Command Prompt window.
10. Click the Refresh button to update the disk selection screen. This step lists the disk.
11. Run Windows Vista Setup to perform a clean installation of Windows Vista.