This method is as easy as Live CD, the only difference is you are using a USB flash drive. However before we go into enumerating the process, ensure you flash drive is a 32 gig flash, yes a 32 gig USB will suffice for this. To install Linux on your system follow the guide below
First you require a unetbootin, so you need to first download it and start it up.
Pick your distribution from the list and download the right version (see live CD for guide).
Pick the drive letter that correspond to your drive and click OK.
Incase unetbootin does not list your file type, download as ISO as described in the live CD method and point unetbootin to the file instead.
The difference after this from the CD system is, your system is not built to automatically run a USB like it does for CD, so here with your USB stick still plugged into your system, restart the system and enter your BIOS setup (by hitting the delete key when you first start up, your PC splash screen will let you know the instance you turn on your system)
Now go to the “Boot” section of your BIOS and find the section for changing your PC’s boot order. Here move your USB hard drive to the top of the list to make it very easy for you. Save your settings and exit the BIOS.
When your computer reboots, it should take you to the Unetbootin menu, from which you can boot into your Linux live session (as described in the live CD method).
You see, it’s a relatively easy process to accomplish. Okay, we are almost done here, there are a few more things you should do to get your Linux operating system working perfectly;
The installation is as easy as it get, it’s just like installing OS like Windows on your PC, just some few steps you need to take to get this done.
PARTITION YOUR DRIVE
Here, installer will ask you to confirm installation of the OS, before you install you will need to partition your drive, not to worry, Ubuntu will automatically partition your drive. However unless your system needs to be partitioned specially like a Mac PC, the partitioning will be done relatively easily, if you have special partitioning needs, you will be given the advance partitioning tool and you will have to partition your drive yourself.
In partitioning the system yourself, ensure you create two partitions, one for the operating system and one swap space; this will help your computer operate with efficiency and while your space is well managed. It is advisable to swap space twice the amount of your RAM memory incase the RAM memory on your system is small.
GRUB AND BOOTLOADERS
Here, don’t get confused it’s really easy than it sounds, just let your computer do the work. Linux will automatically install a new bootloader for you called GRUB. This will It’s going to swap the default bootloader and give you the option to choose between Windows and Linux at startup. Okay now, we know Mac users will have to do a little tweaking, Mac users will have to install GRUB on the Linux partition itself, and Windows users will need to be careful since if you reinstall Windows, you’ll lose GRUB and have to reinstall it yourself.
There you go! To get you newly installed Linux partitioned Operating system working, you just need to restart your computer. When you do, it’ll take you to the GRUB menu, which will let you choose whether to boot into Linux or Windows. Choose your preferred option; however, I will advise Linux so you can familiarize yourself with your new operating system.