Many trusted tech communities (like MDL or Ryan's Update Packs) provide update packs for system integrators. These packs allow you to take a clean Windows 7 SP1 ISO and drag/drop the updates onto it, creating a custom ISO that is fully updated through January 2023.
You cannot install the rollup directly on a base Windows 7 installation. You must have the following already installed: Windows 7 Service Pack 1 (KB976932): Most ISOs include this, but you can find it on the Microsoft Update Catalog April 2015 Servicing Stack Update (KB3020369): windows 7 service pack 3 iso file download link
The lifecycle of Windows 7 included only one official service pack——which was released in February 2011. Instead of a third service pack, Microsoft released a "Convenience Rollup" in 2016 that serves a similar purpose. The Reality of Windows 7 Updates Many trusted tech communities (like MDL or Ryan's
The Phantom SP3
: This package updates Windows 7 SP1 systems with years of patches in one go. It can be found on the Microsoft Update Catalog Security Monthly Rollups You must have the following already installed: Windows
Microsoft released a "Convenience Rollup" (KB3125574) in 2016 that includes almost all updates released after SP1 through April 2016. While not a "Service Pack" by name, it serves a similar purpose.
If you are looking for the most updated version of Windows 7, you can find official or community-maintained alternatives that include post-SP1 updates: Official Windows 7 Service Pack 1 (SP1)