The closest Microsoft ever came to a "Service Pack 2" or beyond was the (KB3125574), released in May 2016.
But Microsoft had a strategic interest in killing it. Windows 10’s subscription-like model (free updates, data collection, forced feature rollouts) couldn’t coexist with a stable, finished Windows 7. windows 7 sp4
The term "Windows 7 SP4" is frequently used in technical forums to describe attempts to install Windows 7 on a Surface Pro 4 The closest Microsoft ever came to a "Service