Thanks guys. I already tried trashing it but it said it was controlled by root, so thanks Trip for that helpful link (It'll probably take me a month to work it out but I'll get there in the end!).
Also thanks for making me feel so welcome...I'm not really a frequenter of forums as I don't have internet access at work, and phonelines are a little unpredictable in this neck of the woods (the uk is pretty primitive compared to the us!), but thanks for everything and I'll maybe talk again soon.
Liz x