Thank you Louie for your reply.
What I ended up doing was deleting avast, yahoo messenger, and firefox completely from my c drive, along with a few other things that were not necessary. I was then able to do a defrag and re download avast to the new hard drive, but yahoo had to go back onto the c drive. Its freed up a little space but i think i'll just have to save some pennies and get a proper computer instead of this little toy as i cant do a defrag with y back on it, there's just not the available space.
Edited by kayra_MS, 11 November 2009 - 02:49 PM.