Windows Update/Checked Build Question

If I have installed Checked Build of XP and I run “Windows Update”, will
it replace my checked build components with checked builds (for the OS
specific components)?

For example, suppose they want to update PortCls.sys. Right now, I have
checked build of PortCls.sys. If I run Windows Update, will the updated
PortCls.sys they place on my machine also be checked?