Microsoft never officially released a Service Pack 3 (SP3) for Windows 7. The last official service pack was Service Pack 1 (SP1) , released in February 2011. Microsoft Learn
Microsoft ended mainstream support for Windows 7 in January 2020. While the official "Download" pages have been taken down, Microsoft still provides the ISO files for Windows 7 SP1 via their center, provided you have a valid product key.
You might see specific blog posts claiming to have an "SP3 64-bit ISO" for 2024 or 2025. These are almost always . They are usually:
While SP3 doesn't exist, you can create an up-to-date installation by using the . This is an unofficial "Service Pack 2" that includes nearly all updates released between SP1 (2011) and April 2016.