A few months ago I installed Ubuntu Linux on an old PC using the free standard distribution CD. I am very impressed with it and thought I would tell you the things about it that I like.
First of all it is is free.
Second, it works on older computers with as little a 256MB of RAM. In other words, I did not need a computer with a fast Intel CPU, a lot of RAM, and a large hard disk drive to run, and that consumes a lot of electrical power, produces a lot of heat and has noisy fans. The old PC I installed it on was too old to even run Windows XP. And I cannot get over how fast and responsive it is.
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This is how you can uninstall GRUB from a Vista partition:
Nautilus has basic configuration capabilities, one of which is the ability to change the background of the view pane (the large panel on the right). To change the background, select the Edit menu and "Backgrounds and Emblems..."