Computer Misuse Act, 1990
This is beginning to look like an offence under Section 3 of the Computer Misuse Act, 1990.
3. A person is guilty of an offence if—
(1) A person is guilty of an offence if—
(a) he does any act which causes an unauthorised modification of computer
(b) at the time when he does the act he has the requisite intent and the requisite knowledge
(2) For the purposes of subsection (1)(b) above the requisite intent is an intent to cause a
modification of the contents of any computer and by so doing—
(a) to impair the operation of any computer;
(b) to prevent or hinder access to any program or data held in any computer; or
(c) to impair the operation of any such program or the reliability of any such data.
(3) The intent need not be directed at—
(a) any particular computer;
(b) any particular program or data or a program or data of any particular kind; or
(c) any particular modification or a modification of any particular kind.
(4) For the purposes of subsection (1)(b) above the requisite knowledge is knowledge that any modification he intends to cause is unauthorised.
If I've configured my computer not receive updates and Microsoft ignores that configuration and the updates are being re-applied I think Section 3 would apply.
It would be hard for Microsoft to deny they have the requisite knowledge since they wrote Windows and the updates.
A new version of an OS could well impair the operation of a computer, especially if some feature has been removed that an application required.