Got the same warning as well with MSE. It also stopped the installer right at the end and closed it down so I have to do it all over again. Wondering right now if I let MSE clean it will it screw up the client.
The e-mail was a real one from Blizzard unfortunately. All the links were to various Blizzard support pages but I still didn't click on them, not that it mattered at the time as it was just telling me the account was banned.
I wished I remembe…