In many case you need install windows 7 from pen drive, because computer DVD Rome may create disturbances or damages. In that case you can install windows 7 from pen drive; it is really easy to procedure. This system are:
Steps-01: At initial time just insert a pen drive in USB cable of PC.
Steps-02: Format your pen drive on NTFS file
Steps-03: Start open CMD.EXE promote
Steps-05: Now, Type DISKPART and Enter
Steps-06: Type LIST DISK and Enter
Steps-07: Type SELECT DISK 1 and Enter [ NOTE: 1 is your pen drive disc number if your pen drive number will show 2/3, you just put 2/3]
Steps-08: Type CLEAN and Enter
Steps-09: Type CREATE PARTITION PRIMARY and Enter
Steps-10: Type ACTIVE and Enter
Steps-11: type FORMAT FS=NTFS and Enter
Steps-12: Type ASSIGN and Enter
Steps-13: Type EXIT and Enter
Steps-14: Enter your WINDOWS 7 in your computer [Note: After entering WINDOWS 7 CD, don’t cancel Command Promt ]
Steps-15: Type CD BOOT and Enter [ Note: “H” is your pen drive name , number if your pen drive name will show K/L, you just put K/L]
Steps-16: Again type CD BOOT and Enter
Steps-17: BOOTSECT.EXE/NT60 L: and Enter [Note: “L” is your pen drive name , number if your pen drive name will show M/N, you just put M/N]
Yes, you got success of your work; you will install windows 7 from pen drive. Oh! Yes, how can you install your windows by pen drive?
Steps-1: Bootable pen drive enters in your PC.
Steps-2: Restart your PC.
Steps-3: Delete/F2/F12 Press and enter BIOS setting.
Steps-4: Select Pen drive from First Boot Device and save by press F10.
Ok, Enjoy your hard work and I think you will comment for install windows 7 from pen drive.