My computer broke Ubuntu (or did Ubuntu break my computer?)

I tried updating to Dapper today. It did not go so well.

You know how I keep talking about my computer overheating? Well, the problem is avoidable in Windows. In Kubuntu, my computer overheats within minutes. So I still tried upgrading, but unfortunately, it overheated. I tried it from just the command line, but it still overheated--in the middle of depackaging the files I finally managed to download.

Now I have segmentation fault errors when I try to boot into Kubuntu. :/ So I think I'll just wait for the Dapper CDs that I ordered and do a clean install...I don't have anything important on there anyway, so I might as well start fresh.