Problems with computer operating systems do not do arbitrary things in the absence of someone consciously using the exploit to make it do arbitrary things. If Windows was a metaphor for unfriendly AI, then it would be possible for AIs to halt in situations where they were intended to work, but they would only turn hostile if someone intentionally programmed them to become hostile. Unfriendly AI as discussed here is not someone intentionally programming the AI to become hostile.
Problems with computer operating systems do not do arbitrary things in the absence of someone consciously using the exploit to make it do arbitrary things. If Windows was a metaphor for unfriendly AI, then it would be possible for AIs to halt in situations where they were intended to work, but they would only turn hostile if someone intentionally programmed them to become hostile. Unfriendly AI as discussed here is not someone intentionally programming the AI to become hostile.