I was working on a friends PC the other day. It had Windows XP Home on it and several viruses! After cleaning out the viruses, I updated the PC to XP SP 2 to get the security advantages that the service pack confers.
However, on re-starting the PC after the install, the Security Centre gave a warning that Automatic Updates were not turned on. On attempting to turn it on from the Security Centre, I got the error message “The security center could not change your automatic updates settings”.
I tried changing the Automatic Update settings through the Control Panel but according to the Control Panel, the Updates were turned on! However, every time I re-started or logged in again, I got the warning “Your computer may be at risk”.
I did a Google search on this error and found a resolution on Google Groups – after registering the dlls in this thread, I closed and re-opened the Security Centre and the Automatic Updates showed as being on.