If performance is the issue, you'll likely get more bang tweaking browsers than changing the OS. There are some fine little taskbar resource monitors for XFCE and Cinnamon, and likely for LXDE as well to keep an eye on RAM and CPU use as you go. I have Bleachbit set to run at startup on my Mint systems primarily to clean the browsers - usually it finds and deletes about 500mb of junk after a week or two between boots. Chromium / Chrome is more demanding of resources than Firefox, needing more RAM and CPU than the OS does. The big slowdown on my netbook comes from browser resource demands (which are twice what the OS needs) and the build up of browser junk files, not from the OS. XFCE "idles" (running OS only, no software or extra processes) at around 200mb of RAM (which is similar to properly configured XP) and I'd guess Zorin is similar. You'll see below I've got the same Acer One dual booting from a 250gb HD and often run on 8gb Live USB. View online or download Acer One Zg5 Service Manual. This procedure is not supported by Apple or Acer. My experience has been Mint XFCE is more polished, sets up and works better out of the box, and has better pre-installed software than Lubuntu, can't speak to Zorin. Through the OSx86 project, an Aspire One can boot and run a modified version of Mac OS X, including iAtkos, iDeneb, XxX and Kalyway distributions.