Looks like I just joined the club of all those with NVIDIA chip set problem. I have a Laptop VGN-NR32S and all the symptoms you mentioned. The only way around the problem is simply disabling NVIDIA on a device manger. I have opened my case a day ago using on-line support and simply asking for the collection of the faulty laptop. I feel robed and expect having farther problems with customer service. I will be nicely surprised if they can fix this computer by the end of this year.
