How to make a Bootable Pendrive without any software. This will be only for Windows 7 and Windows 8. Just go step by step:
1. Insert your Windwos 7 DVD if you have. Actually I do not use any DVD or CD so skip this part and download the iso file which is better. Just use any tool to mount your drive: I use UltraISO, PowerISO, whater u find there on internet or try this method from microsoft:
http://www.microsoft.com/en-us/download/details.aspx?id=38780
2. Insert a minimum 4GB pendrive or bigger.
3. Format your Pendrive and choose NTFS(Select Quit Format and click to start)
4. Open Command Prompt/ CMD
5. type the letter from your pendrive like p:
5. Now you are inside the pendrive so it should be like this:
P:\>
6. Type these Commands
P:\>cd boot (Press Enter on your keyboard)
P:\BOOT>bootsect /nt60 d: (In this case you see the letter from the mount DVD drive which is D
If you do everything how I mentioned above u will get this message
Target volumes will be updated with BOOTMGR compatible bootcode. Etc...
7. Just go back to pendrive letter again:
P:\BOOT>cd\ (After doing this you will get just P:\>)
P:\>
8. Type cls to clean your windows in order to have a clear page.
9. Here we go with the last command
P:\>xcopy p:\*.* /s/e/f d:\ (With this command you're asking to your mount drive D: to copy all files to your pendrive P: )
The process will begin and you must wait for some minutes and then your pendrive will be ready to boot with Windows 7.
That's all folks!