Microsoft's KB5127936 update targets a Windows slowdown affecting app launches

Microsoft is rolling out update KB5127936 for Windows 11, which is intended to fix a performance issue that can slow down how applications start, according to a report by Neowin.
What the update addresses
The reported fix is delivered through KB5127936, an update for Windows. According to Neowin, the problem it targets is a factor that has gone unnoticed and that can hold back performance, particularly when applications are launched.
Neowin's report describes the issue as a performance crippler that was overlooked, but the details of its cause and its measured impact are not set out in the verified facts.
Background on Microsoft and Windows
Microsoft is a software and software development company based in Redmond. It was founded in 1975, and its products and services include Microsoft Windows, the operating system the update applies to.
Open questions
- How much faster do application launches become after installing KB5127936?
- Which Windows versions and users are affected by the slowdown and receive the fix?