Battle.net app won't install

It gets to 90% and gives me the “something wrong with a file” error. BLZBNTAGT00000840

I deleted all files and folders. App data, local app data, program files, program data, temp, everything. Then cleaned out the recycling bin and restarted pc.

Windows firewall is set to allow the setup wizard.

I am at a total loss here. I’ve had Battle.net installed on this pc before and I havent changed any settings since uninstalling it.