What U NEED:

USB Pen Drive (Min 4 GB)
Windows 7 ISO DVD OR MOUNTED ISO (32 bit or 64 bit)
MBRwiz (Replacement for diskpart since it doesnt treats USB as disk)


Video:
Install Windows 7 From Pendrive - Video



1. Format your Pendrive with NTFS .

If NTFS doesnt appears in the list , type

convert i: /fs:ntfs (Where “I” is your USB drive latter)


2. Now Extract MBRwiz to non-windows drive.

3. Type CMD in run box


Command prompt will open


Type


mbrwiz /list (note down disk number of your USB Pen drive)


mbrwiz /disk=X /active=X (X is Disk Number of your USB Drive)


exit




Open Another Command Prompt Windows and type

J: (Drive letter of Windows 7 DVD)


CD boot


bootsect /nt60 i: (i is drive latter of your USB drive )



Now copy all the contents of your DVD to your USB Drive

Restart Your PC and set your USB Drive as Boot Drive . If everything goes right, windows installation will start from your USB pendrive:D