witcher 2 enhanced edition

Well with all the new talk of the Witcher3 I re-installed The Witcher2 and downloaded the Enhanced copy with all the new patches.
Everything looks great, but I can't get my mouse to work worth a dam. Has anyone else had this problem? I tried all sorts of settings that didn't seem to do anything at all…
Could it be that I am running Windows 8 now?

Also anyone that has download the Enhanced copy of it is it worth a play through again?

Thanks in advance,

Celtic