XP overlay option from Dell

So I understand Dell sells XP Downgrade option where the XP OS os pre-installed, and supplies with Windows 7 media.

However, they also sell XP overlay option.  What does that mean?  Two OS runnning at the same time and you can choose which on to boot?
Anyone knows?

Thanks.
LVL 17
Tiras25Asked:
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mcsweenSr. Network AdministratorCommented:
This is MS Virtual Machine technology...

I do not see a huge performance hit but there is one...

Intel Core Duo T7800 @ 2.6 GHz
4 GB RAM

Windows Experience 6.1 for CPU and RAM

Your CPU must also support Intel-VT or AMD-V and will need to be enabled in the BIOS

More Here:
http://www.tomshardware.com/news/windows-xp-mode-virtualization-intel,7709.html
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mcsweenSr. Network AdministratorCommented:
Where are you seeing this XP overlay option?

You might be better finding out what this from the horse's mouth, so to speak.  Do you have an account rep with Dell, if so I would ask them.
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Tiras25Author Commented:
Well the rep is just  a sales person.  She saying "Windows XP Mode uses virtualization technology to let applications running on a virtualized copy of Windows XP show up in the Windows 7 Start menu and on the Windows 7 desktop."  

What do you think?
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mcsweenSr. Network AdministratorCommented:
Ohh; that's Windows XP mode for Widows 7.  It is basically just a virtual machine...

More Info here...
http://windows.microsoft.com/en-US/windows7/products/features/windows-xp-mode

This works ok; I'm running Win7 x64 and use XP Mode for testing quite a bit since most of my clients are still XP 32bit.
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mcsweenSr. Network AdministratorCommented:
That showing the application in the Start Menu/Desktop just means you can install an application in the XP Virtual machine then create a shortcut to it (the application) on the Win 7 desktop/start menu.  If you launch the app from these shortcuts you don't actually see the Virtual Machine window.  It makes it look like the application is running on the Win 7 computer when it is actually running in a virtual machine.
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CDBLUCommented:
You can run every windows version on a windows è. Need just a virtual machine file
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Tiras25Author Commented:
Thanks mcsween,
So is it a MS virtual machine technology?  Would it affect the performance by running two OS simultaneously?
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johnb6767Commented:
Windows XP Mode No Longer Requires Virtualization Hardware
http://lifehacker.com/5497316/windows-xp-mode-no-longer-requires-virtualization-hardware
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