Windows patches can be forcibly reversed, reopening bugs
Briefly

These methods enable rogue users, intruders, and malware to remove Microsoft updates, making old bugs exploitable to fully hijack the system with administrative access, though potentially less damaging for most users.
The approach by Alon Leviev involves downgrading various Windows components, allowing control over update contents, affecting OS kernel, DLLs, drivers, and even the virtualization stack.
Read at Theregister
[
]
[
|
]