Excuse me my ignorance, but what's a clipping plane? As I only use that i7 for TG renderings, without actually working in them, it's not that awful to not see the sky. But it's still annoying that updates degrade some things. Would resetting the 3D preview help and only be necessary once, or do I continually have to deal with that problem if I decide to update again.
If it would help to insert a proper video card, that's what I would consider.