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HP Pro 3500 and Elite 7500 Microtower Business PCs - Downgrade Problems from Windows 8 Pro to Windows 7 Pro

Issue

Unable to Boot from The CD/DVD Drive.

Following is the error message while installing Windows 7 Pro from the HP Quick Restore CD's:

The system recovery media does not support this computer. You are not able to restore this system with the media.

Solution

To downgrade the operating system from Windows 8 Pro to Windows 7 Pro, perform the following steps.

CAUTION: You have to copy the Windows 8 Pro product ID before formatting. The Product ID is required for Windows 7 Pro activation.
  1. To boot from CD/DVD drive, perform the steps mentioned below:
    • Restart the PC.

    • Press the ESC key during POST.

    • Press the F10 key to go to the Computer Setup (Optionally, user may press F10 from the Startup Menu).

    • Go to the Security menu then Secure Boot .

    • Confirm the message by pressing on F10 .

    • Set the first item Legacy Support to On .

    • Set the second item Secure Boot to Disabled .

    • Set the last item Fast Boot to Disabled , Validate F10 .

    • Go to the Storage menu then Boot Order .

    • Select UEFI Boot Sources and Press F5 to Disable it, Validate F10 .
      NOTE: Make sure the Legacy Boot Sources is enabled and the ATAPI CD/DVD Drive is the first one .
    • Go to the File menu then select Save Change and Exit .

    • Insert the first HP Quick Restore CD.

    • Enter the 4-digit code displayed on the screen then press Enter .

    • Press F9 to acess to the Boot menu then Select ATAPI CD/DVD Drive .

  2. To install Windows 7 Pro properly, the Build ID must be changed by performing the following steps.

    • Restart the PC.

    • Press the ESC key during POST.

    • Press the F10 key and go to Computer Setup (Optionally, user may press F10 from the Startup Menu).

    • Go to the Security menu then System IDs .

    • In Build ID field insert the right character, to find it edit the 1st CD , the Build ID is located at \HP\MLS\BUILDID.INI copy it + #SABF#DABF.

    • Go to the File menu then Save Change and Exit .
      NOTE: You need to contact Microsoft Support to activate Windows 7 Pro operating system after Installation providing Windows 8 Product ID.

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