Standby/hibernate causes my computer - most of the time, but not always - to restart at the boot screen with an error message warning of an unexpected shut down. This probkem only occurred after I upgraded Vista to the RC, not while I was using the W7 beta daily from a separate partition. I have unsuccessfully been trying to isolate the cause or conditions for this eror. All drivers, incl NVIDIA video drivers, are up to date. I have disabled hybrid sleep, the windows media server preventing sleep, the automatic hiberantion and standby settings and anything else I could tweak. I am back to the most basic configuration I could set up. I have also tried enabling and disabling he Sony hibernation service (whateer that does in Win 7) To reproduce this error: Fresh start, no applications loaded. Wait 10 mins for all services to start up. Standby: Screen blanks, disk activity for 20 secs, sleep mode. Wake up is instant. Wait 10 mins and standby again: Screen blanks again, disk activity continues without coming to an end. No reaction to keybaord, mouse or display being lowered. Hard reset is necessary. (Sometimes, after a lengthy inerval the computer powers off at some time, and reports error on boot) Sony Vaio notebook VGN-FZ280E. Any advice on troubleshooting this issue would be appreciated.

Now - more than a year after your original post - I am experiencing the exact same symptoms. If I chose "hybernate" from the logon-screen (before login on) the computer will hybernate. But if I choose hybernate after logon, disk activity will be heavy fore 3-5 minutes, and after that, that computer shuts down. Next time I turn on the computer, it will report "windows shut down unexpectedly". Medion MD8833 with MS-7502 board. Windows 7 Home Premium, Upgraded from Vista Home Premium Did you ever resolve your problem ? (and if so, how?)