1. Download "Windows 7 USB DVD Download Tool" freeware from Microsoft website
2. Minimum 4 GB USB pen drive /memory card
3. Windows ISO image
Advantage for bootable USB/memory card
1. Handy to carry
2. Faster installation speed compared to DVD/CD
Install and launch shortcut Windows 7 USB DVD Download Tool on desktop
Click on Browse and select a WINDOWS ISO image and hit "Next"
Select "USB Device"
Click "Begin copying"
A small window pops up, click Erase USB Device, then Click Yes.
After completing, boot via USB/memory card same as like we install from DVD/ CD