You will need
- Windows installation disk
- USB-flash card
Instruction
1
This method is not suitable for computers with relatively old versions of the BIOS because they were not designed to use USB devices before starting Windows shell. Create the installation flash drive. To do this, insert the Windows disc in the drive of any PC or laptop and the flash drive into a free USB slot on the same hardware. Create an ISO image of the disk with the operating system. For this you can use DeamonTools or Alchogol Soft.
2
Download the Windows 7 USB/DVD Download Tool. Reformat your flash drive. Run the program and follow the step-by-step instructions, install the operating system image of Windows 7 to your pendrive.

3
Restart the computer and press Del at the beginning of startup to enter the BIOS. Select "Boot Device Priority" and make your USB device first in the list.

4
Save the changes and restart the computer. Further, the standard way to install the operating system.