After reinstallation of winxp, updates fail."access denied". I have turned off windows firewall, unloaded antivirus. What other precaution should I take? I have reproduced the log below:

705.469: DoRegistryUpdates:UpdSpInstallFromInfSection Failed for ProductInstall.GlobalRegistryChanges.Install error: 0x5
705.469: INF_REGISTRY Failed
705.469: DoInstallationoRegistryUpdates failed
709.454: Unregistration of sprecovr successful
709.704: Access is denied.
753.469: Message displayed to the user: Access is denied.