Why do computers do that?

I mostly work off an external hard disk at the moment as i'm working in about 3 locations most of the week - and I tried to do some work last night and it had switched all the settings from G:\ to H:\ meaning all my site setups in Dreamweaver were wrong.
Why do computers feel the need to change things like that? There is nothing else on drive G!

Speaking of computers one of my friends who I've known since I worked at now defunct IT Distributor Connexe Peripherals - Chris - is leaving the UK this weekend to live in Australia with his boyfriend. He is an IT genius / God - and I wish him all the best out there. Someone reminded me the other day that when I worked there, there was an armed raid on the place - 6.30 at night came in with a shot gun and knives - they weren't very professional though as they lost the gun and a knife half way through the raid - idiots!! They managed to put a stanley knife through my leg whilst they were tying us up with the gripper tape.

Not doing much this weekend - joy of joys - well probably working and I think sarah has been pencilled in to trim some of the conifers in the back garden which haven't been cut for a long time.