I feel like a retard, easy questions...(i think)

[Suwalski]

Ok first of all, when i try to shut down my PC, go to start and then try to find the shutdown button, it's not there. Though the Log-off button is there. What is going on? Where's my shutdown button? I have windows XP.

Ok one more, when i open up IE, it says something like "Serial99.com" in the top menu(the same menu where you can minimize, maximize or shutdown your window). For instance right now it's "The 2+2 Forums: Make a New Post - Forum (Computer Technical help) - Serial99.com

How do i remove that serial99.com line?

I know i sound like a retard, and i probably am, but be kind and help me out. Thank you very much!