Hi can i get Amiga OS 4.0 to run on my laptop? It is an Acer and has Windows 7
No OS4 on a laptop.
You may try AROS on your Acer. Or if you get hold of a Powerbok you may try MorphOS on that. With OS4 there's no way to use it on a laptop. The mysterious OS4 netbook (aka the Limebook) is probably vapor only and ridiculously underpowered anyway.