Microsoft officially ended support for Windows 7 on (Extended Security Updates until 2023 for some businesses). However, legitimate ISO files can still be downloaded from:
The 64-bit version of Windows 7 offers several advantages over the 32-bit version: windows 7 64bit iso
Once you have the ISO file, you cannot simply click it to install. You must create "bootable media." This is typically done using a USB flash drive and a tool like Rufus. After flashing the ISO to the drive, you restart your computer, enter the BIOS or Boot Menu, and select the USB drive to begin the installation process. System Requirements Microsoft officially ended support for Windows 7 on