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When installing Windows XP SP3, yoou may be faced with error code 0×87FF054F “Internal error occured”. This can happen, if the Windows Automatic Update service is disabled. Could also be a problem with the “Background Intelligent transfer Service”.

Those who ran Windows update yesterday or today on your Windows Computer running WIndows XP SP2 or Windows XP SP3 would have found security update KB951376 installed. For those, who look into the details, you would have noted that this update was already installed on the updates from the 11th June. Also, your “Control Panel [...]

Windows XP SP3 installation may fail with the error code 0×80070005 and/or one of the following errors
Service Pack 3 setup error. Access is denied.
Service Pack 3 setup error. Service Pack installation did not complete
This is very likely a restricted registry permission in the Windows Registry. This could be caused an application like Antivius software which changs [...]

On AMD based computers , after upgrading to Windows XP SP3 the system may continously reboot or report the following error
A problem has been detected and Windows has been shut down to prevent damage to your computer…
Technical information:
*** STOP: 0×0000007E (0xC0000005, 0xFC5CCAF3, 0xFC90F8C0, 0xFC90F5C0) SYSTEM_THREAD_EXCEPTION_NOT_HANDLED
This is caused by the intelppm driver. This driver is not [...]

After installing Windows XP Service Pack 3, you will find the “Address” option in right-click Windows Taskbar – Toolbars is missing from the available options.
Before installing SP3

After installing SP3