If you have already installed a version of XP SP3, you will be prompted to install SP3 when you install SP3. Please uninstall and install it. Is there any way to uninstall Windows XP SP3 without uninstalling? The answer is yes! Just modify the registry!
Open the registry editor, find HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Windows, and find the DWORD value CSDVerision in the right column.
If this value is:
hexadecimal 100, 256 decimal, the service pack version displayed by the system is SP1;
hexadecimal 200, Decimal 512, the service pack version displayed by the system is SP2;
300 in hexadecimal, 768 in decimal, the service pack version displayed by the system is SP3;
and so on. We will modify it to SP2, which is to modify it to hexadecimal 200, decimal 512. Deceive the program, you can directly install a new version of SP3.
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