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Rolling back from Windows 7 - XP

Is it possible to roll back from Windows 7 - XP?  Is there a simple way to do this?  We have the WinXP SP2 and 3 discs.  Reason is co-worker software is not compatible with Win 7 as of now.  Want to roll him back but when we boot from Win XP SP 2 disc it goes through the Windows setup procedure, but when trying to start windows so as to format drive and install a XP - get blue screen asking the following:

A problem has been detected and windows has shut down to prevent damage to your computer. (Blue Screen).  Check for virues, remove any installed new hard drives or hard drive controllers.  Check your hard drive to make sure it is properly configured and terminated.

Run CHDSK /F to check for hard drive corruption, and then restart your computer

Technical info:

stop: 0X0000007B
1 Solution
There is no simple way to roll back form 7 to XP as here is no upgrade from XP to 7
Lee W, MVPTechnology and Business Process AdvisorCommented:
There was no upgrade from XP to 7 so there definitely is no easy downgrade / un-upgrade from 7 to XP.  The error you're getting is a STOP error related to storage devices.  XP is aware of the drivers and technology that existed 9 years ago - AGES in computer terms.  You can use a tool like nLite to slipstream the storage drivers (assuming XP drivers exist for your hardware) into an XP SP3 CD (you should not be installing with SP2 anymore).  Or you can look into BIOS to see if there are any settings for your hard drive config to run in a "compatibility" or "legacy" mode (doing so can impact performance).

Finally, you could also look into running the non-compatible app in XP mode OR upgrade the app.
You need to change the sata controller form AHCI to ide mode.
Or streamline the drivers into an XP install using nLite or other utility or when prompted to add drivers have them extracted to a USB drive or floppy and point to them.
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There are two solutions for this issue:

1. This error comes up because the Windows XP Setup procedure does not detect your hard drive controller correctly. There is a setting in the BIOS called SATA Controller Mode or similar where you can change the Mode to ACHI, ATA or Legacy Mode. Change the Controller Mode to ATA or Legacy then you should be able to reinstall Windows XP from the Installation Disk.

2. If you have Windows 7 Professional, Enterprise or Ultimate you can install Windows XP Mode which is basically a Virtual Machine where you can run Software which is not compatible to Windows 7.
Here is the link for Downloading Windoes XP Mode: http://www.microsoft.com/windows/virtual-pc/download.aspx
qec-cmolloyAuthor Commented:
Also, had a disc with Windows XP SP 3 for that particular machine that also worked to roll back from win xp to win 7

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