Help me please!

Ok I've been wondering for a very long time now, and I've asked around but no luck.
I have a Sony Vaio all in one pc, and i want to upgrade the graphic card and everything but i don't know how or is it even possible.

Sony eSupport - VPCL212FX - Support

best thing it sounds like you can do is a google search...
https://www.google.com/#q=how+to+upg...ny+vaio+laptopⓘ

HAHAHAHAHAHHAHAHAHAHAH ALL IN 1 PC?
YEAH, DREAM ON

Lol this looks like a friggin nightmare