[Rawe]

There is special Microsoft fix for this problem, refer:
http://support.micro...om/?kbid=313322
It says that you need to contact M$-techsupport and they will send you the special fix.

If and only if, the fix sent by M$ does'nt get the job done, goto the next steps.
Follow the steps below:

• In your BIOS set CD-ROM has 1st Boot Device.
  
• Insert XP Setup CD, to boot from CD.
  
• After the intial loading of drivers is over, on the Welcome to Setup Screen with 3 options; Press R key, to "Repair XP installtion using Recovery Console".
  
• On the next screen you will be asked to choose your Windows installtion, choose the one that is causing the problem by typing the number beside it.
  
• Now you will be prompted for the password of Administrator, enter it; If password is blank, just press <enter>.
  
  
• Below are two ways to recover from this problem from the Recovery Console, use any one of them.
  Use Method1 only if u downloaded and installed SP2.
  Use Method2 if u have installed SP2 from CD and u have the CD; or if u have'nt installed SP2 at all.
  • Method1:
    Type the following commands:
    cd \WINDOWS\ServicePackFiles\i386
    copy userinit.exe c:\Windows\System32.
    
  • Method2:
    Type the following command:
    expand x:\i386\userinit.ex_ c:\windows\system32\userinit.
    (where x: the drive-letter of ur CD-ROM drive and c: is the partition where XP was installed)
  
  
• Reboot PC and boot into safe-mode (Press F8 before booting).
  
• In safe-mode, Start-> Run.
  Type: regedit
  Press <enter>
  
• In regedit, goto: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon.
  In the right-pane, check if the value of the userinit variable is C:\WINDOWS\system32\userinit.exe,
  If not, change it to that.
  
• Reboot PC normally.

by darth_ash