cannot boot xp after sp2

installed sp2 update, now cannot boot up, tried safe mode,
last known good boot. gets stuck at window progress bar
and then tries to reboot again without sucsess

http://support.microsoft.com/default.aspx?kbid=875350
How to remove Windows XP Service Pack 2 from your computer

http://support.microsoft.com/default...t=windowsxpsp2
How to use the Automatic Recovery feature to recover your computer if the
Windows XP Service Pack 2 Setup program is not completed successfully



wrote in message
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installed sp2 update, now cannot boot up, tried safe mode,
last known good boot. gets stuck at window progress bar
and then tries to reboot again without sucsess

Recover your computer to a bootable state and remove
Windows XP SP2
To recover your computer to a bootable state and remove
Windows XP SP2, follow these steps:
Start your computer by using the Windows XP Recovery
Console or by using the Microsoft Windows Preinstallation
Environment (WinPE), depending on your situation. To
start your computer by using the Recovery Console, follow
these steps:
Insert the original release version of the Microsoft
Windows XP CD in your computer's CD drive or DVD drive,
and then restart your computer.

Note Your computer must be configured to start from the
CD drive or DVD drive. For more information about how to
do this, see your computer's documentation or contact
your computer manufacturer.
When the "Press any key to boot from CD" message appears,
press a key to start your computer from the Windows XP CD.
When the "Welcome to Setup" screen is displayed, press R
to start the Recovery Console.
When you are prompted, type the number that corresponds
to the installation of Windows that you want to access
from the Recovery Console, and then press ENTER. For
example, if you have one installation of Windows on your
computer, type 1, and then press ENTER.
When you are prompted, type the Administrator password,
and then press ENTER.
At the command prompt in Recovery Console, type the
following lines. Press ENTER after each line.
cd $NtServicePackUninstall$\Spuninst
batch spuninst.txt
exit

Remove the Windows XP CD from your computer's CD drive or
DVD drive, and then restart your computer.
Run the Windows XP SP2 Removal Wizard to remove Windows
XP SP2. To do this:
Click Start, click Run, type cmd, and then click OK.
At the command prompt, type the following lines. Press
ENTER after each line.
cd %Windir%\$NtServicePackUninstall$\Spuninst
spuninst.exe

Follow the instructions to remove Windows XP SP2.