Edit Registry without Booting into XP

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Osiris

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Follow the guide below to create a UBCD4
A Guide at Creating a UBCD/UBCD4Win Combo CD - UBCD4Win Forums

Once completed follow the next steps below:

1. Boot up computer with UBCD4Win.
2. Once Ultimate Boot CD 4 Windows is fully loaded, click Start > Programs > Registry Tools > RegEdit
3. Select HKEY_USERS
4. Click File from menu bar and select Load Hive
5. Browse to C:\Windows\System32\Config\ and select SOFTWARE. Make sure that it is C:\ and not X:\ drive, otherwise you'll be loading the CD's registry.
6. Enter the Key Name as NEWHIVE.

7. Expand HKEY_USERS and you'll see a newly created NEWHIVE in the list. Expand the NEWHIVE and locate the following location.
HKEY_USERS > NEWHIVE > Microsoft > Windows NT > CurrentVersion > Winlogon
8. Double-click Userinit and set it's value correctly such as C:\Windows\System32\Userinit.exe,
9. Go back to HKEY_USERS and select NEWHIVE.
10. Click File from menu bar and select Unload Hive. Click Yes when asked if you are sure you want to unload the current key and all of its subkeys.


and a much simpler method:

Use PC Regedit and get it ---> http://www.pcdisktools.com/download/PCRegedit.iso

  • Burn the downloaded PCRegedit.iso to a disc. Refer to this guide on how to burn ISO images on a CD.
  • Boot up the computer with the PC Regedit disc and it will load up ISOLINUX 3.11.
  • When everything is loaded, you will see a MyFileChoose Title window. By default you are at config folder. Scroll down a little, select SOFTWARE and click OK.
  • Navigate to root > Microsoft > Windows NT > CurrentVersion > Winlogon.
  • Look for Userinit key and make sure that the value is set as C:\Windows\System32\Userinit.exe, If the Userinit key is not there, you can add a new key by right clicking at the right pane and select Add Key.
  • You can use this method to load up other registry files and edit them. Here are the explanation of the 5 registry files for HKEY_LOCAL_MACHINE.
  • Registry Location: HKEY_LOCAL_MACHINE\SOFTWARE
    File: SOFTWARE
    Backup: SOFTWARE.LOG
  • Registry Location: HKEY_LOCAL_MACHINE\SECURITY
    File: SECURITY
    Backup: SECURITY.LOG
  • Registry Location: HKEY_LOCAL_MACHINE\SYSTEM
    File: SYSTEM
    Backup: SYSTEM.LOG
  • Registry Location: HKEY_LOCAL_MACHINE\SAM
    File: SAM
    Backup: SAM.LOG
  • Registry Location: HKEY_CURRENT_USER
    File: NTUSER.DAT
    Backup: ntuser.dat.LOG
  • Registry Location: HKEY_USERS\.DEFAULT
    File: DEFAULT
    Backup: DEFAULT.LOG
 
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