Version of Windows 7 is showing not genuine so want to go back to Windows XP

I recently updated my Windows XP to Windows 7 Home Premium, but after a few weeks, my computer has decreed that my version of Windows was not authentic. Attempts to repeat the upgrade failed, and now I want to just go back to Windows XP and buy an upgrade is appropriate at a later date. Unfortunately, my Windows XP CD doesn't let me downgrade. Is there a way to downgrade your version of Windows?

Reinstall Windows XP
http://michaelstevenstech.com/cleanxpinstall.html

Insert your Windows XP CD, and then restart your computer.

When you are prompted to boot from the CD, do so. To do this, press any key on the keyboard.

Windows XP will go into its configuration process.

Once you arrive at the welcome configuration, press enter on your keyboard to start the installation process

Press F8 on your keyboard to accept the license agreement

Select the partition, and then press D on your keyboard to remove it

Select Format the partition using the NTFS file system

Press F on your keyboard to start the formatting.

Installation files will now be copied to your hard drive

Your system will be rebooted, the installation of Windows XP will continue

Tags: Windows

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    Office Diagnostics: 025D1FF3-364-80041010_025D1FF3-229-80041010_025D1FF3-230-1_025D1FF3-517-80040154_025D1FF3-237-80040154_025D1FF3-238-2_025D1FF3-244-80070002_025D1FF3-258-3_E2AD56EA-765-d003_E2AD56EA-766-0_E2AD56EA-134-80004005_E2AD56EA-765-b01a_E2AD56EA-766-0_E2AD56EA-148-80004005_16E0B333-89-80004005_B4D0AA8B-1029-80004005

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    Proxy settings: N/A
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    Download unsigned ActiveX controls: disabled
    Run ActiveX controls and plug-ins: allowed
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    Allow the Internet Explorer Webbrowser control scripts: disabled
    Active scripting: allowed
    Recognized ActiveX controls safe for scripting: allowed

    Analysis of file data-->
    [File mismatch: C:\Windows\system32\slc.dll[Hr = 0x800b0100]

    Other data-->
    Office details: {398D0EBE-3C7A-4A21-9BCF-5F4A9B93FED8}1.9.0027.06.1.7601.2.00010100.1.0.001x 64*-*-*-*-HYRR200426-OEM-8992662-000062S-1-5-21-1267405743-3636759100-585774851Hewlett-PackardHP Pavilion Notebook PC g6InsydeF.1420120920000000.000000 + 00058173A07018400FE40090409India Standard Time(GMT+05:30)03HPQOEMSLIC-MPC100100Microsoft Office Enterprise 2007127480B9502DF0D86oYWOW5ayFE3pZ jvTpuXYsY64JE plus 89388-707-8722531-65066 14

    Content Spsys.log: 0 x 80070002

    License data-->
    The software licensing service version: 6.1.7601.17514

    Name: Windows 7 Ultimate edition
    Description: operating system Windows - Windows (r) 7, channel OEM_SLP
    Activation ID: 7cfd4696-69a9-4af7-af36-ff3d12b6b6c8
    ID of the application: 55c92734-d682-4d71-983e-d6ec3f16059f
    Extended PID: 00426-00178-926-600006-02-16393-7601.0000-0242014
    Installation ID: 006466603276732001145011356603354051021166721866343391
    Processor certificate URL: http://go.microsoft.com/fwlink/?LinkID=88338
    The machine certificate URL: http://go.microsoft.com/fwlink/?LinkID=88339
    Use license URL: http://go.microsoft.com/fwlink/?LinkID=88341
    Product key certificate URL: http://go.microsoft.com/fwlink/?LinkID=88340
    Partial product key: HYRR2
    License status: licensed
    Remaining Windows rearm count: 0
    Trust time: 21/06/2015-17:59:50

    Windows Activation Technologies-->
    HrOffline: 0x8004FE21
    HrOnline: n/a
    Beyond: 0 x 0000000000000100
    Event timestamp: 6:20:2015 17:24
    ActiveX: Registered, Version: 7.1.7600.16395
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    Activation 1.0 data OEM-->
    N/A

    Activation 2.0 data OEM-->
    BIOS valid for OA 2.0: Yes
    Windows marker version: 0 x 20001
    OEMID and OEMTableID consistent: Yes
    BIOS information:
    ACPI Table name OEMID value OEMTableID value
    APIC 183 HPQOEM
    HPQOEM FACP SLIC-MPC
    HPQOEM 183 DBGP
    183RD HPET HPQOEM
    STARTUP 183 HPQOEM
    MCFG 183 HPQOEM
    WDAT 183 HPQOEM
    UEFI 183 HPQOEM
    ASF! 183 HPQOEM
    SLIC SLIC-MPC HPQOEM
    SSDT HPQOEM INSYDE
    ASPT 183 HPQOEM
    HPQOEM 183 FPDT
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    SSDT HPQOEM INSYDE
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