TechSpot

Windows XP bootup loop

By Gubozo
Mar 7, 2010
  1. after running adaware to remove a trojan, my computer will reboot just after the windows startup screen finishes loading, both in safe and normal mode. can i please have some suggestions on how to fix this problem.
     
  2. rduarte

    rduarte TS Rookie

    It may be necessary you to repair your xp installation, it should fix this issue; also check it for malware or virus after the repair.
     
  3. Broni

    Broni Malware Annihilator Posts: 47,975   +271

    Try system restore from recovery console....

    If you have Windows XP CD... (if you don't have Windows CD, scroll down)

    1. Boot from the CD.
    2. When the text-based part of Setup begins, follow the prompts. Select the repair or recover option by pressing R:

    [​IMG]

    3. You'll find yourself at this screen:

    [​IMG]

    4. Once you are at the Recovery Console you will be given at least one choice of Windows installations. Normally the choice you want is the number 1 choice. Click the number 1 key at the "top" of the keyboard and click enter.

    NOTE: at this point your numbers to the right of your keyboard are turned off. If you insist on using these keys for your numbers remember to hit the Numbers Lock key before clicking a number over there or your computer will automatically reboot and you will have to wait through the previous steps to get back to the console.

    5. You will be given a message asking for the administrator password. Unless someone or something has messed with your computer there is no password so you just click the Enter key.

    6. This will bring you to a prompt that says:

    C:\WINDOWS>

    7. Type:

    cd \

    Press Enter

    Note: between "cd" and "\" there should be a "blank space" otherwise the command won't work

    8. The prompt should now say:

    C:\>

    9. Type:

    cd system~1\_resto~1

    Press Enter.

    ===============================================================================

    Note: If it gives an error "Access Denied" while accessing the folder, follow the method below

    Type: cd \

    Press Enter

    Type: cd windows\system32\config

    Press Enter

    Type: ren system system.bak

    Press Enter

    (note the spaces between ren and system, and then between system and system.bak)

    Type: exit

    Press Enter

    now the computer should restart, then follow steps 1-9


    ===============================================================================

    10. Type:

    dir

    Press Enter

    NOTE: When you hit enter it will list all the restore points folders like "rp1", "rp2" we have to see the last restore point to copy the file from a recent backup. If the restore points have more than one page then you have keep on hitting the key to view the last restore point folder.

    NOTE: It is a good rule of thumb to choose the files from the restore point folder which the second to the last one.

    11. Type:

    cd rp{with the second to the last restore point number }

    Press Enter

    Example: cd rp9. if rp10 is the last restore point

    12. Type:

    cd snapshot

    Press Enter.

    NOTICE: Now the command prompt will look like this:

    c:\system~1\resto~1\rp9\snapshot

    Note : restore point 9 assumed for clarity of the content.


    13. Type:

    copy _registry_machine_system c:\windows\system32\config\system

    Press Enter

    14. Type:

    Exit

    Press Enter.

    Final note : If the above procedure won't solve the problem, repeat all steps, but in step 13 type:

    copy _registry_machine_software c:\windows\system32\config\software

    Alternatively, select different restore point.



    If you don't have Windows CD...

    Download Windows Recovery Console: http://www.thecomputerparamedic.com/files/rc.iso
    Download, and install free Imgburn: http://www.imgburn.com/index.php?act=download
    Using Imgburn, burn rc.iso to a CD.
    Boot to the CD...let it finish loading.
    When the "Welcome to Setup" screen appears, press R to start the Recovery Console.

    Follow steps 3 - 14.
     
  4. Gubozo

    Gubozo TS Rookie Topic Starter

    sorry broni but this didnot work. still is looping. i`ll try run throw your guide but just one quick question in step 13 is it copy_ or copy(space)_registry?
     
  5. Broni

    Broni Malware Annihilator Posts: 47,975   +271

    The latter.
     
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