How do you reset memory on the 770? I have been using it for 2 weeks now and this morning when I went to CNN it locked up on me. Forced it to turn off, when it came back on I went to memory in control panel and it would not show anything (hung up) and after a little bit a message showed that said "not enough memory, please close some applications" then the control panel closed. I have the latest software version (Updated it a week or so ago). Tony