I disabled / uninstalled macAffee it was hanging doing its realtime scans. I have Avast as well. I reinstalled the window security updates and it seems to works so far
To fix this issue, the first time CUK exchanged the computer and things were fine for a while. now after a few windows updates I am getting computer freezes frequently. I do see some dcom errors in the event log but nothing that would or should kill ...