Development Thread Dolphin Bisection Tool for finding broken builds

[Jack Frost]

Windows 10 has those installed by default, and 4.5 is an in-place upgrade for 4.0...so you should be set.
Maybe this is a different issue? Windows might block the .exe file when downloaded from the internet, check the .exe (and the .dll files) by doing right-click, Properties and see if there's an Unblock button. If there is, click it (because Windows will prevent the thing from running otherwise).