Help me!

I need some advice.

My computer has been acting up for a while now and by a while I mean since like may. It shuts down randomly, batt life is like 10 mins when not plugged in 20 if i'm lucky, 4 if not, things are un-click-able, slow as 8am econ class.
It hasn't been much of a big deal since school was out and I wasn't doing big things and what not.
I mean its still working. I'm writing this on it now. But!
Senior year is starting meaning a lot of writing/programming/procrastination I'd call a break.
And I can't have my computer being menopausal on me.
So what I did is I bought a new computer… I haven't opened it up yet… cus I'm still playing with the idea… (Now I can't click on the finder. tsew.)

Pros:
New computer.
Not going to wig out on me
I can work on my senior things and what not
I have a protection plan on the new one.

Cons:
I have to go rob a bank now.
I can't sell this old computer for scrap (cus my cuzn stuck on a Hannah Montana sticker on it… -__-)
I was stupid enough not to the get the protection plan before and to fix it would be …robbing another bank.

Help! What should I do?

xx
KD