"Dolphin.exe has stopped working" on game boot

[uiblis]

Booting any game causes "dolphin.exe has stopped working" to appear and close down.

Interestingly, uninstalling and reinstalling dolphin allows each game to work once. Closing the window and then booting the same game again will always result in a crash.

Any suggestions? Tried on 4.0.2 as well as some netplay branches