Minimum configuration to run Win 7
Before installing, you should check whether your computer configuration is enough to run Windows 7:

CPU processor 1GHz or higher.
The RAM capacity for 32-bit versions is 1 GB, for 64 bits is on 4Gb.
Hard disk space for the 32-bit version is at least 16 GB or 20 GB for 64 bits.
Graphics card supports DirectX 9 with WDDM 1.0 or higher.
Overview of the procedure to install Windows 7 fully on the computer
Step 1: Download the installation of Windows 7 in the link below to your computer.
Step 2: Create a USB to install Windows under the old standard (Legacy) or create a USB to install Windows according to the new standard (UEFI).
Step 3: Determine the key for entering BIOS and BOOT to set up the Boot to USB or DVD.
Step 4: Perform the steps to install Windows 7 according to the steps below.
Step 5: Install the driver for the device to get to the network, sound, ... (Search for drivers on Google with the keyword "driver + hostname").
See details here: http://tamsutre.com/share-key-win-7-ultimate-key...