new pc at wal-mart

[Dark Lord Neo]

It's not always THAT easy. That only works if the os you want to install has a boot disk. Sometimes you have to install some basic OS like DOS or something and browse to the disk, where you can then run an installation program. Not all linux distributions, for example, have boot disks.

It's usually fairly easy to just make a boot disk even if the distribution doesn't come with one.