newbie seeking advice

[SteveSpillage]

Cheers guys, it's very encouraging that you all seem to be saying the same sort of thing. I had read on other sites that the graphics/sound couldn't be changed but wanted to make sure, I'll go for a 2 gb RAM upgrade and have a read up on swapping HDD for SSD. 
(Sorry, one of the big problems I have is with video/audio. On a bad day you tube is just a bunch of stills in between buffering and the audio can be just as laggy with it.)