How To make Pendrive or USB Drive Bootable

We boot our computer with the help of Bootable OS CD/DVD.But sometime the CD/DVD is not available with us but we have the ISO image of the file.
So instead of burn that ISO image to a CD/DVD you can use your PenDrive/USB Drive as a bootable Device and boot your OS from that bootable USB Drive.
Question is how we make our PenDrive/USB Drive bootable.So here is a very Simple Solution.
For This You have to Download a software called “ULTRAISO”
You can Download it from links below..
link1                        link2
Click here than wait for few seconds and than click on skip add…

Click on the SKIP AD> and proceed to Download…

After You Downloaded The file Install it to Your Computer.

Now carefully Follow The following Steps to Make Your USB/PENDDRIVE Bootable.

1.If You are using Vista/Windows 7 than Run UltraIso using the Administrator Privillage.Or simply run as Administartor.The image shown below is for Your reffrence.In case of XP or Low version of Windows OS you can Directly Run the Software.

2.If  u have patched the setup entered the key the window like this will appear.

3.Click on The Open Icon one the Title Bar or Simply Press “CTRL+O”  the open popup will open like this..

4.Now go to the Location in Your Hard Drive where the ISO file of OS is located.Select the appropriate file and open it.
After You open The file, file will be open in software main window like this

 5.Now Go to the Bootable menu in the Menu Bar. And Select Write Disk Image.. Option.

6.After You Click on this option, A new Window will appear which will be like this.

7 .Select You USB Drive from the Drop Down Menu and click on the Write Option.
You will be prompt with the this Dialoge Box shown below.Click one yes to continue

8.It Will take some time and than Your USB will be Bootable.
You can boot Your computer from this USB.
You can make bootable USB for all type of  OS like WIN 7 ,Vista,ubuntu,mint,etc…
also you can make bootable USB of so many live OS of Linux like BACKTRACK…

NOTE- You cant make Bootable windows XP USB with help of this Software.