Always try to use original installation media (like a retail DVD) or official backup channels if you hold a valid product key. Ensure the ISO file matches the original Microsoft SHA-1 hash values to verify it has not been tampered with. Step 2: Install the Required Servicing Stack Update (SSU)
Once you have compiled your verified, update-integrated ISO file, you must burn it to a physical drive to begin installation. Windows 7 64 Bit Service Pack 2 Iso Download High Quality