[xubuntu] Few questions about Xubuntu

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http://ubuntuforums.org – I am going to assume Xubuntu is the best choice in my situation. Kubuntu 12.04 worked fine on an older computer, but it was evident that 12.10 was too much for it. So, I decided to put Xubuntu on instead, and it loads faster, but it's Xubuntu 12.04. Now, I am trying to upgrade to 12.10, and I don't see the option to do this. In Kubuntu I found a way to try to install, but I can't find how to do this. So here are some questions about getting Xubuntu working. 1. Where are the exact directions for upgrading from 12.04 to 12.10 on Xubuntu? 2. When it loads, I get a yellow note window in the (Hardware)