Did a right click and got to pic below, just as wise now lol
Well these are basically to do with a network connection (mine are there when I connect {dial-up} to the internet. Thought they would also appear to indicate local traffic, if you have two or more PCs networked by cable, I'm assuming you haven't (?). So there is no network cable attached hence the X.
Your motherboard would appear to have a network chip so you don't have to install a network card, by default this is enabled in the BIOS. If you don't use a network (like me) you could disable that in the BIOS.
I don't recognise many of the other icons, avast obviously and the speaker bottom right is your volume controls. The others hover the mouse over them and see what the tooltip says about it, that may help you identify what it is. As I said before use the right click on the icons to see if it makes settings/options available.
So other than that I can't be of much help.
