For the past say 2 months. now... im having issues with USB on the computer.. i think its USB related this is typical 2-3 times a day.. Working working open mail open ical quickly boom.. frozen.. itunes still playing website still being uploaded in background... even photoshop still spitting out files during one of my actions the frozen part is Everything on the usb bus .. mouse, keyboard, peripherals, etc... Unplugging and plugging back in does nothing printer died in the middle of printing big photo -- lost big 24x36 print... mouse doesnt respond nothing USB related works My work around is - I log on using backtomymac on the macbook pro and i can move the mouse around and shut stuff down, finish my emails, and the restart like normal. strange that backtomymac is working... so its telling me everything in background processing is ok Unfortunately, i cant reproduce the problem at all... i believe its USB related as those are the items that freeze up, and i believe when i switch programs quickly it happens, but sometimes its random in what log can i look around in? how do i troubleshoot just a little before going to the next step and bringing into the apple store? i emailed my apple tech and he asked about USB hubs I have two USB hubs , they are 7 port hubs. ubs 2.0... has external power adapter and all 14 slots are full of devices. it happens in normal day to day - jsut ical kind of thing can i check in the system log for anything of interest?? They asked about 3rd party RAM and i do have the OWC ram which hasnt failed me yet.. I think? How to check THANK YOU FOR YOUR HELP YOU GUYS P "