how to create  iso file without software. Oscdimg is additional Microsoft command-line tool. Oscdimg is a command-line tool for creating an image file (.iso) of a customized 32-bit or 64-bit version of Windows.

1.copy this "oscdimg.exe" file into "C:\Windows\System32" location

2.copy all contain of windows 7 DVD in "c" disk

3.right click on CMD & select the "run as administrator"

4.copy the following command in CMD 

oscdimg.exe -bc:\win-7\boot\etfsboot.com -u2 -h -m -lWIN_EN_DVD c:\win-7\ c:\my7.iso

syntax

--->>>>oscdimg.exe -b[location of boot resource(c:\win-7\boot\etfsboot.com)] -u2 -h -m -lWIN_EN_DVD [path of windows 7 contain file "read it"] [path of paste location(write it ){iso file name}.iso]

command:

oscdimg.exe -bc:\win-7\boot\etfsboot.com -u2 -h -m -lWIN_EN_DVD c:\win-7\ c:\my7.iso

syntax:

--->>>>oscdimg.exe -u2 -b[location of boot resource(c:\win-7\boot\etfsboot.com)] -h [path of windows 7 contain file "read it"] [path of paste location(write it ){iso file name}.iso]

command:

oscdimg.exe -u2 -bc:\win-7\boot\etfsboot.com -h C:\win-7 c:\win.iso