Your computer must be restarted before updating can continue
Note: If your computer is unable to recover from the issue, it may restart repeatedly, and then shut down.
You'll continue to see this error each time you run Exchange Setup if this happens.
Press a key or wait a few seconds to continue starting up." After a moment, the computer continues starting up.
In most cases, kernel panics are not caused by an issue with the Mac itself.
You’re free to ignore optional updates for a while, if you like.
You can choose what you want to do with optional updates in your Windows Update settings, and you could have Windows only install critical security updates.