Installing Windows 7 From a USB Stick - A Warning
Whether you’re using a computer with no DVD drive or just fancy a challenge, installing Windows 7 from a USB device is pretty cool way to install the latest version of the Microsoft OS.
All you need to do this is a suitably-sized USB flash or HDD device (at least 4GB), a suitably-specced computer, and a Windows 7 DVD or ISO file.
However, before we proceed, a word of warning that you won’t get anywhere else.
As effective as this process is, if your PC or laptop BIOS and/or motherboard won’t accept booting from USB, you simply will not be able to install Windows 7 in this manner. There are plenty of Pentium 4 PCs that have the CPU speed, required RAM, video RAM and HDD space to run Windows 7 – but without the motherboard allowing booting from USB, an installation by this means will not be possible. Before proceeding, to avoid disappointment and frustration, check your motherboard manual for USB booting information!
Depending on your Windows version, setting up the USB stick can be performed either in command prompt or using additional software.