Make Flash Drive Bootable

For Windows 7...

A tool by Microsoft that can install windows through pen drive. Click here to download it.

Remember that this Microsoft Boot Tool detect Untouched ISO if you haven't, to get it go  below on Windows 7 post links.

 

for  Windows XP users needs to be install an KB932716 before installing it.

OR

try this portable small tool WiNToBootic.

Requirement & How to do:-


1. you should have an minimum 4gb USB drive(not sd cards) and carefully set 
    the target drive.
2. plug it in your system usb port then run tool select image file.
3. Run tool after finish restart your system, check it.

For Windows Vista/XP...

This boot tool for XP/Vista & 7 but it doesn't perfectly works for windows 7 or it's environment so use above tool for it. 
Download it here and extract zip file then run file WinToFlash.exe
it requires minimum 2 or 1 gb space drive.
Note that every bootable making tool, before making it, formats the drive. So take backup your data before do it.