1) UAC = User Account Control, and overrides certain specific admin rights such as the right to run programs automatically etc. etc. Basically it is a security feature which prevents programs from adding data in certain sensitive locations (such as program files); prevents programs from running programs; and often asks you for giving permission when you run a program.
Since you did not know about this, let's forget about the UAC for now - it only applies to the system as a whole; and not to the user account. (In other words, it limits your admin powers to your own account.)
2) My sig!Or: the list of stickies in this subforum.
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I should've noticed before.This problem of yours is probably not Vista related after all, but simply a matter of "You messed up": you have most likely installed EB in some non-existing folder...
Please read my guide (it covers that issue quite extensively) and pay particular notice to the bit about where you should install EB into.
Please note that there is no default location which will always work: the reason is that EB is not a piece of software on its own, but rather more like a fan-made extension to the game (better still: modification of, aka mod). This means that its correct install location depends on where you have chosen to install RTW, and more specifically: where you have your copy of RTW 1.5 (should you have various versions of RTW on one system).
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