Some files may be left in the Connectix\Virtual PC folder after you upgrade to Virtual PC 2004 (833335)

MORE INFORMATION

• *.vhd - Virtual hard disks
  
  Virtual hard disks that are created in Connectix Virtual PC may be used to create a new virtual machine in Virtual PC 2004 or may be associated with a Virtual PC 2004 virtual machine as a secondary disk. These files are created to access the data that is stored on the virtual hard disk. A virtual hard disk may contain an installed operating system or data files. Do not delete these files unless you are sure that the operating system or data files that are contained in the virtual hard disk file are no longer required.
  
  A virtual hard disk that is created in Connectix Virtual PC can be used to create a new virtual machine without creating a new virtual disk. Users may associate multiple virtual hard disks with each virtual machine.
  
  Note Make sure to change any unique information, such as the IP address and the computer name, before you run duplicate virtual machines on a network.
  
  The following are some of the different kinds of virtual hard disks:
  • Dynamically expanding virtual hard disks
    
    A dynamically expanding virtual hard disk is a file that is created by a user on the physical computer's hard disk. A dynamically expanding virtual hard disk file dynamically expands as users write data to it. At first, a dynamically expanding virtual hard disk uses only a small amount of space. Then it expands up to the maximum size that is specified when the virtual hard disk is created.
  • Fixed-size virtual hard disks
    
    Like a dynamically expanding virtual hard disk, a fixed-size virtual hard disk is a file that users create on the physical computer's hard disk. The file is approximately the same size as the virtual hard disk and doesn't expand or compress. For example, if a virtual hard disk is 2 gigabytes (GB), the virtual hard disk file is 2 GB.
  • Linked virtual hard disks
    
    Virtual PC supports linked virtual disks hard disks that are directly linked to a disk in the physical computer. This advanced capability permits you to use already-existing hard disk configurations.
• *.vud - Virtual undo disks
  
  The Virtual Machine Undo Drive permits users to delete any changes that they make to the virtual hard disk during a session. A session lasts from the time the virtual machine is started until it is closed. Virtual PC stores these changes in a temporary .vud file. At the end of the session, users can save, commit, or delete the changes. By using undo disks, users can start with the same virtual disk every time. For example, you can use undo disks to test a deployment scenario in a specific environment and to delete the changes at the end of the session. The next time that you start the virtual machine, it will be in a clean state, ready for another test.
  
  If the physical computer is shut down before the virtual machine is closed, and then you upgrade to Virtual PC 2004 the next time the physical computer is started, a .vud file remains in the following folder:

  DriveLetter:\Documents and Settings\account\Application Data\Connectix\Virtual PC

  If no critical data is saved on the virtual machine in the last session, you can delete the .vud file.
• VPCKeyboard.dll - VPCKeyboard.dll file
  
  If the VPCKeyboard.dll file remains in the following folder, it can be deleted:

  DriveLetter:\Documents and Settings\account\Application Data\Connectix\Virtual PC