I've made no changes in the configuration of Parallels Desktop 4.0 after I changed the Kaspersky firewall setting to "Training" (which took care of the "Cannot Connect to Parallel Service" message I began getting when turning my computer on); however, I'm now getting the message again. I'm wondering what is going on. I began getting this same message several days ago, and John suggested I download build 3810, which I did. However, that didn't fix the problem, but I was able to fix it with the change in the firewall setting to "Training" as mentioned above. I know others have been getting this same message according to what I've been reading in the forums.