Earlier when I started up my computer in the place where I usually have the status bar icon showing my internet signal strength there is now a little box I guess it is a computer with what I guess looks like a power cord lol with a red x through it. Usually this pops up for a moment while I'm connecting to the internet and then goes away. What does it mean? Thank ya.
It's just telling you you're not connected to the internet while your computer is trying to connect. The signal strength bars are basically the same symbol, except it changes because you have a wireless connection rather than ethernet.
Could be windows updates. I've had icons randomly do different things after updates before. Or maybe you just never noticed it like Jumbo said. Who knows.