Yeah but you have to be able to run non-approved exe's to do that and so many places still don't allow that.
In my job even the developer computers are really closed down, its really anoying
(Thanks vim for the not-administrative rights exe also :D)
What he told me is that the system is designed for the normal users, so is as restricted as possible so that they cannot break it.
Since more and more developers have been joining the company this is becoming a really anoying issue, but nobody of the people who have enough power and could force a change cares about this stuff.
Personally, with my own custom system I would be very much productive, altough vim already boosted my productivity even being on windows (xp) ...