Garrghhh!!
Just when I thought I was getting somewhere with the stupid borkiness, it goes and confuses me again! It appears it was not the hacks I had installed that were causing the borkiness, but some of my other downloads. I've only gotten part-way through my reinstallation of my downloads and already there's so much borkiness in CAS. Luckily there isn't any anywhere else. I've checked the posts about the Windows 7 update, and that's not a problem for me. So that leaves a dodgy download. *sigh* I'm so over this already.