Your McAfee antivirus sometimes block other installation, the reason behind it could be that it consider those installations as threat. There are some programs that need full access and for that you need to change your firewall settings. Open the Firewalls setting page and then click program permissions. Now select the program with Outgoing or blocked access, then click edit. Pull down the Access menu and select full and finally click Apply. If this doesn’t resolve the issue then contact 0808-101-2159 McAfee Help Number (toll-free) and get step by step assistance over this issue or any other issue from our experts.