Installed Jaunty Jackalope with Wubi. Definitely feels like a smoother UI on my Lenovo.
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If you don't have a spare computer, want to try out a Linux distribution, and are a little intimidated by the details of setting up a dual-boot, check out Wubi.
If you have problems getting Ubuntu Hardy Heron to work properly, I strongly recommend you check out Intrepid Ibex, the newest release. I'm having way fewer issues with it on my Toshiba Satellite notebook (if you are fine on Hardy Heron perhaps "upgrading" will mess you up).
Linux is not for everyone.
told you its a much more refined linux than the other ubuntu versions... perhaps one of the distributions as far as polish, organization, etc.
I'm a fan of Fedora, but this is definitely a top notch release from the Ubuntu team. My only gripe is the lack of PackageKit as the default package manager.
Strangely, I had no end of problems trying to install JJ with the Wubi installer on the disc (it would complain about a missing .ISO file then quit), and I ended up having to download a more recent version of Wubi, running that from a folder also containing a copy of the CD image. Still, it makes life much easier if you need to dual-boot.