You need to get the SP4 version that matches the installed version of
Windows. Either you are using the checked/debug SP4 to upgrade a standard
retail installation, or you are using the standard retail SP4 to upgrade a
checked/debug installed version. Since you can't change the installed
version, you need to get the other service pack.
> When attempting to download/install SP4, I get the
> following error message:
[quoted text clipped - 5 lines]
>
> Jerry