Problem Installing Virtual PC for XP Mode in Win 7 Pro(64) SP1

Question

XP Mode has successfully installed, but Virtual PC has not. Installing Virtual PC requires only a Windows Update, so I downloaded the correct file -- Windows6.1-KB958559-x64-RefreshPkg.msu. When I try to install it I get that this update is already installed
on my computer, but I still don't have Virtual PC.
What now?
Thanks for any guidance that can be offered.
Rob

Answer 1

Installing Virtual PC requires only a Windows Update...
Kinda/sorta.
<QP>
To use Windows XP Mode, you need to download and install Windows XP Mode, and Windows Virtual PC, the program that runs virtual operating systems on your computer.
When you install a program in Windows XP Mode, the program becomes available for use in both Windows XP Mode and Windows 7.
To download and install Windows XP Mode
Go to the Windows XP Mode page in Download Center.
Under Quick Details, select your language.
Click Continue and follow the instructions on the screen to validate your copy of Windows 7.
Select a version of Windows XP Mode to install and click Install.
Note:              Windows XPMode_N versions don't include Windows Media Player.
Click Run in your browser's message bar, and follow the instructions on the screen.
When setup is completed, click Finish.
To download and install Windows Virtual PC
Go to the Windows Virtual PC page in Download Center
Under Quick Details, select your language.
Click Continue and follow the instructions on the screen to validate your copy of Windows 7.
Select a version of Windows Virtual PC to install and click Install.
Note: The x64 version works with 64-bit versions of Windows 7.  The x86 version works with 32-bit versions of Windows 7. To find out if your PC is running 32- or 64-bit Windows 7, click the
Start button , right-click
Computer, and then click Properties. 32-bit and 64-bit information appears next to
System type.
Click Run in your browser's message bar, and follow the instructions on the screen.
Click Yes to install Update for Windows (KB958559).
If you accept the license terms, click I Accept.
After installation is complete, click Restart Now to restart your computer.
To set up Windows XP Mode for first use
Click the Start button , click
All Programs, click Windows Virtual PC, and then click
Windows XP Mode.
<figure class="embedObject"><figcaption class="caption">                   
Windows Virtual PC and  Windows XP in the list of programs         </figcaption></figure>
If you accept the license terms, click I accept the license terms, and then click
Next.
On the Installation folder and credentials page, accept the default location where Windows XP Mode files will be stored, or choose a new location.
Type a password, type it again to confirm it, and then click Next.
On the Help protect your computer page, decide whether you want to help protect your computer by turning on automatic updates, and then click
Next.
Click Start Setup.
After setup is complete, Windows XP Mode opens in a separate window.
</QP>
Source & more:
http://windows.microsoft.com/en-us/windows7/install-and-use-windows-xp-mode-in-windows-7
~Robear Dyer (PA Bear) MS MVP-Windows Client since 2002 Disclaimer: MS MVPs neither represent nor work for Microsoft