Hi Pete,
I believe this laptop came shipped with Vista at some point so should be compatible with 7 on the drivers side. The first thing I would try is installing all the windows updates. If you are still using 64bit and are unable to use the inbuilt mouse and keyboard after that, I'm pretty certain there is a way to disable the signed driver requirement on Windows 7 as it may be that 7 is blocking drivers meant for 32 bit and/or that aren't signed.
I hope this helps, but if not let me know and I'll look into it further.