How to Replace DLLS XP3
Windows XP Service Pack 3 updates several DLL files on the computer, but if the installation fails for any of these files, you must reinstall the service pack. The XP3 download stores all the old files in an Uninstall directory, so you can roll back any DLL changes. If you only need to replace one or two DLL files, you use the uninstall folder to replace the XP3 DLL files.
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Instructions
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Click the Windows "Start" button and type "cmd" in the search text box. Press "Enter" to open the command prompt.
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Type " cd %Windir%\$NtServicePackUninstall$" and press "Enter." This directory contains all of the backed up DLL files.
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Type the following statement to copy a DLL file from the backup directory to the working Windows XP directory:
xcopy %Windir%\$NtServicePackUninstall$\myfile.dll %systemroot%
The systemroot variable indicates where all the Windows installation files are located. Replace "myfile.dll" with the DLL file you want to copy.
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Press "Enter" to copy the DLL to the system root. After the DLL file copies, reboot the computer for the changes to take effect.
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