Actually, I find any “don’t remind me again” button in a pop-up message to be a sign of poor application design. In every case that I’ve seen one, the message was completely unnecessary in the first place. Instead, software should have better default settings, or be redesigned to avoid the message-spamming situation from the beginning.

Even the concept of a focus-stealing message is an anachronism. We saw it a lot in software from the 80s and 90s but those machines were not as powerful. Today, we know people have tons of stuff to do with their computers and that they are always multitasking; the idea that any single message could be considered important enough to stop the user from doing anything else is misguided.

If I turn on my computer, or wake it from sleep, or start working on it, I have stuff to do. If a message is going to demand my attention, it had better be saying “your laptop appears to be on fire” and not “Windows 10, oh please oh please!?”.

It's not a button, it's a link in a low-contrast colour. Designed not to be easily noticed by the casual user.

That button actually installs Windows 10. So there is no need to remind you again. /joke