I got a new MBP lately, with OS X Lion, (2.5 GHz i7, 8GB RAM, 128 SSD), but it keeps on freezing to the point where I have to do a hard-reboot.
What happens is that the beach ball appears for no apparent reason (no difficult computations, like editing a video, or compiling something), just browsing for example, or copying from a USB drive to the local drive. If I click nothing, the bar with applications seems to be responsive, as well as the bar with the time, language, etc... at first only the top application is not responsive. As soon as I click something else, it becomes unresponsive as well, such as the bar with applications, finder, etc.
I started the Activity Monitor to show the disk activity, as well as CPU usage - none seem to be used too much when this happens (after all it is just simple browsing, not even watching a movie, and the configuration of the machine is good)
Any ideas how to debug this or how to resolve it? It keeps on happening a lot, like 2-3 times a day.