ioBroker windows download -error

[Ande]

I am simply wanting to get to grips with IOBroker so went for the easy option of downloading the windows exe file

when i go to open - It will not get any further than telling me there is an error with 3rd party antivirus and that i need to switch off third party antivirus (i'm using avast). I do this but still comes up the same message !

[Ande]

I have installed node js from the node web site but still get the same message when trying to execute the iobroker program

Any one any ideas!