After installing SP3 on XP can not get computer to boot...

I installed SP3 on XP. When I turn on the computer, it takes me to the screen to select a start upward. I does not start in safe mode, when I choose the other options of the Windows XP screen comes up but it does not start...

Hello

Try to uninstall Sp3 via the recovery console.

Here are the steps that you must follow

Thank you

Thomas

Link: http://support.microsoft.com/kb/950249

Method 4: Use the Recovery Console

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click on the number below to view the article in the Microsoft Knowledge Base:

322756 (http://support.microsoft.com/kb/322756/) how to back up and restore the registry in Windows

If you cannot remove Windows XP SP3 by using one of the previous methods, follow these steps:

  1. Insert the Windows XP CD in the CD drive or in the DVD drive and restart your computer. When you receive the following message appears, press a key to start your computer from the Windows XP CD:

    Press any key to boot from CD

    Note The computer must be configured to boot from the CD or the DVD player drive. For more information on how to configure your computer to start from the CD or the DVD player drive, refer to the documentation that came with your computer or contact the computer manufacturer. Alternatively, you can use a Windows XP boot disk. For more information, see the following article in the Microsoft Knowledge Base:

305595 (http://support.microsoft.com/kb/305595/) how to create a boot disk for an NTFS or FAT partition in Windows XP
  • When you receive the Welcome to Setup message, press R to start the Recovery Console.

    Note Several options will be displayed on the screen.

  • Select the correct installation of Windows XP.

    Note You must select a number before you press ENTER, or the computer will restart. Generally speaking, only the1: C:\Windows is available.

  • If you are prompted to type a password to admin, do. If you do not know the administrator password, press ENTER. (As a general rule, the password is empty.)

    Note Do not continue if you do not have the administrator password.

  • At the command prompt, type cd $ntservicepackuninstall$ \spuninst, and then press ENTER.
  • At the command prompt, type batch spuninst.txt, and then press ENTER.

    Note The Spuninstal.txt file appears. As the file scrolls down, you will see errors and files that are copied. It is a normal behavior.

  • After Windows XP SP3 is removed, type exit and press ENTER.
  • Restart the computer in safe mode. To do this, press F8 when the computer restarts.

    Note After you restart the computer, the computer may stop responding, and you will see a black screen. The mouse works. In this case, restart the computer by turning off the computer, and then turn it back on. The second reboot allows you to open a session.

  • When the computer restarts, Windows Explorer (Explorer.exe) does not run and the icons of Windows and the Start button are unavailable. To resolve this issue, follow these steps:
    1. Press CTRL + ALT + DELETE and then click Task Manager in the Windows security screen.
    2. Click file, and then click new task (run).
    3. In the Open box, type regedit, and then click OK.
    4. Locate and then click the following registry subkey:
      HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcSs
    5. In the Details pane, right-click ObjectName, click modify, typeLocalSystem in the data value box and then clickOK.
    6. Restart the computer
  • Use one of the previous methods to remove Windows XP SP3 from your computer.

    • For more information about how to install and use the Recovery Console, click the number below to view the article in the Microsoft Knowledge Base:

    307654 (http://support.microsoft.com/kb/307654/) how to install and use the Recovery Console in Windows XP

    If you need assistance on how to install, reinstall, or uninstall Windows, visit the Microsoft Web site at the following address:

    http://Windows.Microsoft.com/en-us/Windows/help/install-reinstall-uninstall (http://windows.microsoft.com/en-us/windows/help/install-reinstall-uninstall)

    Tags: Windows

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