ok 2 things,
as said in the previous post your ubuntoo is old,
so your going to have to download a new one
i dual boot as well, using xp, ubuntoo and pc linux( which is on a 2.5" external drive)
before u start use your xp disc and cut ur drive into two partitions, format one nfts for windows and leave the other one blank for some reason ubuntoo will instal easier and you can see in the partition tool which is which, personaly ill think you will find in a very short amount of time your going to be stuck for disk space,with yor 120gb hard drive youll be left with 2 partitions of 55gb, one will be cut in 3 by linux( 7.5gb, 4gb, 43.5gb)
so after you run out of space get a little 2.5" 160gb drive this will cost all of 80$ weather there american or euro ones.......
cut this in half and format 50gb on nfts and the other in ext 3 , download ifs drives this will alow windows to read write to the ext section and you will never need to defrag it, with the nfts put a program files folder there and you can install games etc in there and as long as its plugged in it will work...................
please read post below , i meant to say ext 2 oooops