I made a bootable usb stick using Pen Drive Linux's USB Installer, but my PC doesn't recognize it when booting.
I have set the BIOS to select USB as first choice but it just bypasses it and boots from the hard disk.
Download this software UnetBootIN |Download the windows version if you plan to run the software on windows
Restart the Live USB drives making process from scratch.
I think something went wrong when the first time you tried. It should work fine this time :)