What are the specs of that computer and what exactly do you mean by the box "failed" you? Do you mean Win7 failed to install or something more, like a failed drive?
I have had good luck with Linux on Dells; I'm typing this on a Dell Dimension 4400 P4 with 4 GB RAM which I use as my file server running Debian Sid which started as an XP box. I have had over the years three Dell laptops and one netbook which have served me well.
Installing Linux is pretty easy, much easier than installing Windows. Most Linux distros know that they might be installed by someone who has never installed an OS before and try to build user-friendly installers. Linux Voice recently produced a video showing how to install Linux Mint; it's the second one at this link:
http://www.linuxvoice.com/getting-started-with-linux/
I'm not saying to install Mint, though it's a good choice, but the install is fairly typical of most Linux install routines. Watching the video could be instructive if you've never installed a OS.
One of our members recently produced a "sticky" post for persons considering switching from Windows to Linux, in which he summarizes some of the common choices of distros. Give it a look:
http://www.linuxquestions.org/questi...xp-4175502495/
As an aside, LQ recommends that post titles be more informative than something like "Help Me" or "Urgent" so that persons scanning the title of threads will have an idea of what the post concerns.