New
#11
You can't install Win7 on an external drive.
(well at least not without some advanced tricks)
See How to install Windows 7 on a portable hard drive
So many try, so many fail. Have yet to try it with eSATA, which should work after all, it is driven from an internal connection.
How to install Windows 7 on a portable hard drive
Revisited with link to hack/tweak