All official security patches up to the end of support, plus Extended Security Update (ESU) packages.

Change the boot order to place your as the first priority. Save changes and exit. Step 3: Run the Windows 7 Setup Wizard

Ensure your SATA controller mode is set to (not IDE or RAID).

Load your vanilla Windows 7 ISO into your modification tool (e.g., NTLite).

Once you reach the desktop, you aren't quite finished. To make Windows 7 viable today, do the following:

This paper outlines the process for performing a clean installation of Windows 7, including tips for using updated or "remastered" (ISO) images designed to work on modern hardware.