Can you provide all your specifics? Your OS version, LW version, connection type & devices (modem/router brand name(s) & model number)?, Where you're connecting from (home, school, work, etc.)? How much ram & available HDD you have? What firewalls you have? Firewalls can be configured thru instructions here: http://www.limewire.com/english/content/firewalls.shtml