Hi Folks, A couple months ago, my thinkpad T400 stopped being able to hibernate. Now, when I try to hibernate, the screen goes blank, the hard drive cranks for 10-15 seconds, and I get the login screen again (with all my programs still running, etc). It's as if I locked my screen. Further attempts give the same result, except that the HDD doesn't crank for as long - I get the login screen almost instantaneously. I have tried disabling and re-enabling hibernation, and deleting the hiberfil.sys file (powercfg -h off/on), all to no avail. There are no logs in the event viewer which indicate anything wrong relating to hibernation. I have made sure that Wake on LAN is turned off in the BIOS, as well as on all network devices in the device manager. Hybrid sleep is turned off. I have no USB devices plugged in. The problem persists with clean booting (i.e. no startup programs, only microsoft services). Sleeping works just fine. No restore point is available from prior to when the problem started. Any ideas on what I might do? To microsoft mods: *please* read what I have already tried above before suggesting any solutions (such as clean boot, etc). Thanks, Allie Win 7 Pro x64 Thinkpad T400 2764-CTO ATI Mobility Radeon 2450 6 GB RAM 500 GB HDD fully updated

update: the problem resolves when i assign a drive letter to win 7's hidden partition. Of course, I don't want to do this all the time. This ties in with some other problems I've been having, I think: my machine is having trouble assigning drive letters to some USB devices (http://www.sevenforums.com/crashes-debugging/101772-not-assigning-drive-letters-usb-drives.html#post878813), and when I hit F8 on startup, I don't get the safe boot menu (i just get a key stuck error). So: any ideas now? Seems like windows is having trouble accessing certain volumes, or something like that?

Please check if the system drive is marked as active. Best Regards Dale QiaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale, Yes, the 100MB System Reserved partition is marked as active. The C: drive is marked as Boot. See http://grove.ufl.edu/~ashenkin/temp/diskmgmt.jpg for a screenshot of disk manager. Running the following command and setting my C: partition to Active allows my machine to hibernate without having to assign a drive letter to the hidden parition: bcdboot c:\windows /s c: I then assigned the hidden partition to E:, ran bcdboot c:\windows /s e: , and rebooted. The same old problem as it always was returned. bcdedit isn't able to locate the bcd store (it *is* able to locate it when i put it on the c: drive). I don't know that my problem is with the BCD store itself - perhaps it's some partition table issue, or some pointer somewhere? I also tried booting into recovery console. From there, running "bootrec /rebuildbcd " says that it finds 0 windows installations on the machine . Running "bootrec /scanos" also comes up with 0 installations found. Running bootrec /fixmbr and bootrec /fixboot don't help