Windows 7 system requirement :
|RAM||1 GB RAM for windows 32 bit or 2 GB RAM for 64 bit|
|Free Hard Disk Space||16 GB Hard Disk Space for 32 bit or 20 GB Hard Disk Space for 64 bit|
|Processor||1GHz or faster 32-bit (x86) or 64-bit (x64) processor|
|Display Resolution||DirectX 9 graphics device with WDDM 1.0 or higher driver|
Windows 7 Professional Free Download ISO 32-bit , 64bit :
There are given Download link of windows 7 Professional.
Download 64-bit : Windows 7 Professional 64-bit Download
Download 32-bit : Windows 7 Professional 32-bit Download
How to install windows 7 :
Step 1 : Make boot-able to PEN DRIVE or CD
Step 2 : insert PEN DRIVE in USB port or CD in CD ROM
Step 3 : Now reboot to system and when system is starting then Press any key
Step 4 : Now show a image this type click on Next
Step 5: Click on install now
Step 6 : Here next step will come as Operating System type
Step 7 : Check to agree box and continue as Next
Step 8 : Now Here select Custom(advanced)
Because custom option will give a multiple choice where you want to install.
Step 9 : Here Select to Disk Drive Partion then click on next button
Step 10 : installing windows process will start copy to data from iso file
Step 10 : After complete copy and installation. Here open a new look ..ask for ..enter your name and press Next Button
Step 11 : it will ask for product key here so ignore it and Click on Next .
Step 12 : Your installation has been completed and show to Home screen .
Now Enjoy this !