Problem with transport error 202

Hi, since yesterday I can’t run my sketches!
ERROR: transport error 202: listen failed: Permission denied
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]

I run Win7/64bit and BullGuard antivirus. When I switch off the Bullguard firewall, my sketch can be executed. What goes wrong? What can I do?

Apologies for not answering but I’m now also having the same problem… Sketches run only when firewall is switched off.