TaurAian, here is the information from the svcpack.log:
1270.500: DoInstallation: Installing assemblies with source root path:
f:\154fa47a10a6d9fb099b3d722071\i386\
1272.468: PruneCatalogsFromHotfixes:RegQueryValueEx Failed: 0x2
1272.468: Num Ticks for Copying files : 932562
1272.718: DoRegistryUpdates:UpdSpInstallFromInfSection Failed for
ProductInstall.GlobalRegistryChanges.Install error: 0x5
1272.718: INF_REGISTRY Failed
1272.718: DoInstallation

oRegistryUpdates failed
1295.078: Unregistration of sprecovr successful
1295.234: Access is denied.
1300.828: Message displayed to the user: Access is denied.
1300.828: User Input: OK
1301.671: Service Pack 3 installation did not complete.
Select 'OK' to undo the changes that have been made.
1304.656: Message displayed to the user: Service Pack 3 installation did not
complete.
Select 'OK' to undo the changes that have been made.
1304.656: User Input: OK
1304.671: Starting process:
C:\WINDOWS\$NtServicePackUninstall$\spuninst\spuni nst.exe /~ -u -z
1691.406: Software Update Rollback has completed with return code 0xbc2.
This rollback requires a reboot.
1691.406: Service Pack 3 installation did not complete.
Windows XP has been partially updated and may not work properly.
1695.609: Message displayed to the user: Service Pack 3 installation did not
complete.
Windows XP has been partially updated and may not work properly.
1695.609: User Input: OK
1695.609: Update.exe extended error code = 0x5
1695.609: Update.exe return code was masked to 0x643 for MSI custom action
compliance.
Shutdown Initiated in Self Extractor
"TaurArian" wrote:
> Error message that you receive when you try to update a Windows XP-based computer to
> Windows XP Service Pack 2 by visiting the Windows Update Web site: "Unable to read from or
> write to database"
> http://support.microsoft.com/kb/915169
>
> You receive an "Access is denied" error message when you try to install Windows XP Service
> Pack 2
> http://support.microsoft.com/kb/873148
>
> --
>
> TaurArian [MVP] 2005-2008 - Update Services
> http://taurarian.mvps.org
> ======================================
> How to ask a question: http://support.microsoft.com/kb/555375
> Computer Maintenance: Acronis / Diskeeper / Paragon / Raxco
>
>
> "Perry Mason" <> wrote in message
> news:41271DC2-79D2-4717-BC50-...
> |I needed to reinstall SP2 on my system but now it can not install due to
> | failure to write to registry. Any thoughts would be appreaciated! thnx!
>
>
>