Why did BitLocker suddenly appear?

I'm curious, why did BitLocker suddenly appear on my system? Was it a security update that I missed, or is there something else going on here? I've heard of BitLocker before, but I never expected it to just show up out of the blue. Could it be related to recent changes I made to my system, or is this a common occurrence? I'm just trying to understand the situation and ensure my data is safe. Can you help me figure out what's going on here?