At a guess the icons will include a keyboard driver for your language, windows defender (a little castle), windows security manager (shield), whatever anti-virus program you use, the "start Microsoft Office a little faster" thingy, sound and graphics control thingys, maybe something for the firewall if you're using a separate product, an icon if you have any USB device plugged in, a vertical yellow shield thing if Windows is trying to update, MSN messenger etc., and so forth. Moving the mouse cursor over them without clicking should tell you what they are.