[Fix] Windows XP SP3 (Service Pack 3) Setup Error: Access is Denied, Installation did not Complete

As we all know Microsoft has released the final version of Windows XP SP3 to public and its available via Automatic Updates, Windows Updates and Downloads Center.

Earlier we posted about it at following link:

Windows XP Service Pack 3 (SP3) RTM Released, Download Links Inside

You can download the SP3 from the above mentioned link.


A few people are facing a problem while installing SP3. Whenever they try to install it, Windows shows following error message:

Service Pack 3 setup error. Access is denied.


Service Pack 3 setup error. Service Pack installation did not complete.

If you are also facing the same problem, then follow these simple steps and your problem should be solved:

1. Download and install the SubInACL.msi file from here.

2. Open Notepad and paste following code:

cd /d "%ProgramFiles%\Windows Resource Kits\Tools"
subinacl /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CURRENT_USER /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f /grant=system=f
subinacl /subdirectories %SystemDrive% /grant=administrators=f /grant=system=f
subinacl /subdirectories %windir%\*.* /grant=administrators=f /grant=system=f
secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose

3. Save the file with name "SP3.bat" or "SP3.cmd".

4. Now right-click on the file and select "Run as administrator" option. If you don't get this option, run the bat file directly. It might take some time to complete.

5. After completion, restart your system and now you should be able to install SP3.

Share this article: Facebook | Twitter | Google+ | Reddit | Tell a friend

Posted in: Troubleshooting, Windows XP

Other similar articles that may interest you


  • Your tip worked and has made my day. You are a gem, Thanks "A" Lot

  • WOW !!! After Sooooo may times failing to install SP3, your info was successful in FINALLY getting it done.

    Great.....THANK YOU SO VERY MUCH !!!!!! :) 2-15-13

  • Am rtying to install xp sp3 on P4 and light just went off when I installing and after I turn on computer it telling some settings are missing then I inserted the CD after installing,when it want to boot it went blank saying service over range please help me out

  • VG

    ^^ Start your Windows in safe mode and then correct screen resolution using Desktop Properties -> Settings tab. Set it to 1024x768 first and then you can increase it according to your requirements.

  • This worked perfectly thank you!!!

  • That is an excellent service, compliments for that "little" hint, You´ve got!
    After so much failed attempts I finally had Success. Thank You very much for that valuabel Info.
    How come, MS doesn´t have any solutions to "their" OS?

  • while installing it shows windows is starting then blue screen appear and shows that
    "a problem has been detected and your system is shutdown to prevent damage". i tried 3 times but always it showing thses message pls help me with this....

  • cool,, thx a lot.. :)

  • problem display got enlarged and all settled in centre of dekstop. so kindly resolve it

  • Recovered-restored XP, but reverted back to SP2 - how can I get it to revert back to previously installed SP3?
    Tried to install SP3 and getting Error: Windows XP SP3 Setup Error: Cannot Update a Checked (Debug) System with a Free (Retail) Version of Service Pack 3
    performed: --- In right-side pane look for a String "CurrentType". Double-click on it and change its value to Checked as shown in following screenshot:
    I changed value to 'checked' or 'free' via regedit, reboot and always shows 'Microprocessor Free'
    .... get the same SP3 install error
    Any suggestions?

Leave a Comment