I have recently bought ZA Firewall+Antivirus pack ( now running on Windows 7.
When active it causes browser (Firefox 31) to freeze when loading random sites (approximetly once per 100 site loads) for 2-3 seconds. Also, it causes some programs to freeze before opening for same 2-3 seconds. For example when I open a file in Notepad++ through Filezilla ftp client. Free version of ZA I used before didn't have those problems.

Should I disable some ZA service to resolve the issues?