I've seen the various Norton Security suites to cause such issues and sometimes it occurs after the Norton program has been uninstalled...
Just a thought.. Have you tried turning the Security Center service Off (Stop) then ON (Start), per the link below?
Hope this helps.
The Windows Security Center shows up ...different. None of the gradients or graphics are there and it all looks as some things do when resources are low. The machine is running Windows XP Pro, SP3. It is fully updated and has no other real problems.
This http://img39.imageshack.us/img39/9901/wscenter.jpg is how it looks, and
this is how it should look: http://img377.imageshack.us/img377/91/wscentergood.jpg.
It functions ok, and it's all there, so this is purely cosmetic. No other things open this way on this system.
It's been like this since XP was first installed maybe 3 years ago. It is fully updated, has plenty of disk space and 2Gig of RAM.
Looking at the properties of wscui.cpl in Windows\system32 shows it is is the same as on other systems. I copied wscui.cpl from a system that everything works on properly and when I run it (from the flash drive) on this system it has the same problem.
I've tried googling it, but there seems to be too much other stuff that fits any way I can describe it in a search.