So I have an old PC (Dell Dimension 4400, about 5 or 6 years old) that I believe is virus-infected. I'm not positive it's a virus but I'm pretty sure. The computer doesn't work right at all. It's very very slow. The antivirus software malfuctioned for some reason and it's old and bogged down with who knows what all. What I want to do is put the Linux OS Ubuntu on this computer. I've heard that Ubuntu uses much less space than Windows and works well on older computers. I think that the fact that that Ubuntu is being installed rather than any other OS is beside the point (but correct me if I'm wrong). My question is this: do I need to format the hard drive before installing the OS? Or can I just install Ubuntu and let it wipe out everything in its path? Obviously I want the PC to be virus free. I don't want Windows on the computer, just Ubuntu. I hope to avoid re-installing Windows particularly since I don't know where the startup disc is and it's an outdated version (Windows 2000 Professional). If I do format the hard drive can I then just install Ubuntu without re-installing Windows? Is there a way to format without using Windows? I want to accomplish this in the easiest manner possible. Thank you in advance for any replies. By the way, please ignore my signature. I can't figure out how to delete it.