After upgrading from 3.x to 4.0.3810 all working until I install PIS. Then I cannot connect to the internet. Have deleted all other security software (Norton, etc.). Any ideas how to sort this out?
You need to set firewall to training mode, when you install PIS, if still do not have connection , please create ticket in support we can check situation, http://www.parallels.com/support/desktop/request/