Os in external hdd

I have a wd 250 g hdd and i was wanting to try out windows7 on it so i wouldn’t have to mess with puter if puter has vista will windows 7 boot from external hard drive our am i way off base’


YOurs truly
the inruly



any flavour of Windows will not run off an USB or firewire connected external HDD.

Possible options are: eSata conected HDDs or a virtual machine like VirtualBox or MS VirtualPC.