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 SP3 RTM Available on Windows Update, Automatic Update and Download Center
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.
OR
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.exe 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".
4. Now right-click on the file and select "Run as administrator". It might take some time to complete.
5. After completion, restart your system and now you should be able to install SP3.
This article was posted by VG in following section: Troubleshooting, Windows XP.
If you enjoyed this article, you can subscribe to our RSS feed or free newsletter to get all new articles directly in your Inbox. Also check out our most popular articles and archive to read other interesting articles. If you have some news or tip to share, please send us.
PLX
TNX SO MUCH (PARTY)(PARTY)(PARTY)(PARTY)(PARTY)(PARTY) YOU Rule
MAN
Why are there 4 failed files still I cant install because of those 4 failed files pls help
mr_c
Good advice, however when you save the text file make sure to show extensions in explorer. In other words go to my computer, click on C drive, then Tools-> Folder Options-> View and make sure "hide extensions for known file types" is unchecked, that way your notepad file is saved as a .bat file not .bat.txt
Kacsa
thanks
Lynda
I can't seem to get Subinacl.exe to run - either that or I'm doing something wrong. I double click on it, then a dos window opens and closes seconds later. I am trying to upgrade from XP service pack 1 (or 1A, not sure) to 3. I had service pack 2 but lost it due to viruses and subsequent reformatting and reinstalling of XP.
someone
Run as administrator ?????
there is no such option on Xp right click menĂ¼
VG
^^ Did you try to directly run the file?
gar
Nope, access still denied.
Zxcv
if i install this on xp sp2 pro,
will it be xp sp3 pro?
VG
^^ Yes.