I have repeatedly reported problems with 770 it crashes virtually every time & if I do manage to complete I do not move to the next level. I've tried your suggested fixes loads of times BUT THEY DO NOT WORK. What have I got to do to get your help? This has been going on for at least 6 weeks. All I get is stupid pointless emails asking for feedback which when given is totally ignored, or not even looked at. I think I deserve an explanation regarding this problem,but I won't hold my breath as I don't expect I will receive one going on past experience.