How Do I Do If Certain VMs Running on Windows 2003 64-Bit OS Fail to Upgrade?

The CD-ROM information that does not exist still appears in the registry, so the CD-ROM disk drive is not found when it is being searched in the register during upgrade. You need to choose Start > Run and enter regedit to go to the Register Editor and check HKEY_LOCAL_MACHINE->HKEY_LOCAL_MACHINE\SYSTEM->HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices. See Figure 7-8.

Figure 7-8 Registry Editor

To delete the non-existent CD-ROM information, perform the following steps:

                               Step 1     View the CD-ROM information in the registry.

                               Step 2     Check the CD-ROM disk drive. Only one CD-ROM can be configured in the VM.

                               Step 3     Find out the CD-ROM with consistent information yet inconsistent disk drive and delete it. As shown in Figure 7-8. there is only one real CD-ROM with disk drive D but there is a non-existent disk drive E in the registry which should be deleted manually.