So any way to fix this deleting Rollercoaster tycoon 1 for example
Thanks for all the help
Steve

No, you need to install more RAM. The game needs 256MB's you only have 128MB's. Hard Disk Drive space is something completely different.
I suggest popping into PC World with your machine and telling them you need additional RAM.

Babylonsteve, not only do you need more RAM, you also could use a better video card. Please don't go out and buy hardware without knowing what you really need. Any and Everything must be compatible with your motherboard and other componets as well. Take Lisa's suggestion above and check into PC World for help or you can contact help and support at eMachine.