Re: Thinking about leaving Windows and switching to Ubuntu
Asif, if I'm understanding you correctly then you don't need a VM for ubuntu. You simply can download a "liveCD" from ubuntu site and launch ubuntu from it without having to install it on the machine!
If you prefer, you can even use "wubi-installer.com" utility which installes ubuntu as an app on your windows machine allowing you to test around ubuntu. you can uninstall wubi just like anyother windows app. This is what I installed and I've been so much impressed that I've decided to go the ubuntu way for good.
I only use VMWare's Virtual Machines for my day to day work running on XP Pro. I am sure there is a virtual machine for Ubuntu that I can get from somewhere. I prefer doing this instead of changing the main OS.