MacBook Pro running Osx 10.6.8 will freeze up (spinning beach ball) when connected to internet in my house. Does not do this at Apple store or in places with free wifi. Freeze occurs on wifi and with direct cable connection to modem. No issues using Ipad or old windows machine...connect fine. Internet provider pointing finger at computer since iPad, windows computer and service tech computer (also windows) work. Apple believes issue with internet provider. Genius bar cannot reproduce problem. Stuck in middle. Have tried all sorts of resets, reboots, diagnostics and nothing helps. Computer works fine when offline but can't do a thing with it when connected. This all started when internet provider started replacing copper wire with fioptics and upgrading modem/router. Has anyone had this problem? Any ideas?