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It might be possible that your laptop cannot be downgraded due to license or hardware restrictions &nbsp;.<br />
Have a look at the following link and then email lenovo with your model number to see if you are allowed to downgrade .<br />
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Have a look at the following url as well for info on virtualizing win xp <br />
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<a href="http://www.microsoft.com/windows/virtual-pc/" rel="ugc">http://www.microsoft.com/windows/virtual-pc/</a>
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It might be possible that your laptop cannot be downgraded due to license or hardware restrictions  .
Have a look at the following link and then email lenovo with your model number to see if you are allowed to downgrade .

Have a look at the following url as well for info on virtualizing win xp

http://www.microsoft.com/windows/virtual-pc/ [http://www.microsoft.com/windows/virtual-pc/]

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Line 0 of dmreg.inf is corrupted. Setup cannot continue.<br />
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This is a brand new Lenovo laptop that had Windows 7. Trying to downgrade to Windows XP Pro.
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Line 0 of dmreg.inf is corrupted. Setup cannot continue.

This is a brand new Lenovo laptop that had Windows 7. Trying to downgrade to Windows XP Pro.

Error during Windows install

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.