Windows 7 keeping updating and does not shutdown

The only reasonable thing I see is this:

b9bb9a88 82c8c6ad 893d5e2e b9bb9c30 00000000 nt!IofCallDriver+0x63
b9bb9b60 82c6d26b 853422d8 8530f488 85f76678 nt!IopParseDevice+0xed7
b9bb9bdc 82c932d9 00000000 b9bb9c30 00000040 nt!ObpLookupObjectName+0x4fa
b9bb9c38 82c8b62b 001bdf60 8530f488 00000001 nt!ObOpenObjectByName+0x165
b9bb9cb4 82c96f42 001bdfbc c0100080 001bdf60 nt!IopCreateFile+0x673
b9bb9d00 82a8f44a 001bdfbc c0100080 001bdf60 nt!NtCreateFile+0x34

It's trying to open a file (Create File creates a File Object, not a File on the Drive!), it first looks up the Object Name and then it calls the Driver of the Device being referred to. (From the \\?\Device\File syntax)

It doesn't look like that it is something on the hard drive as that would be different, by going through MUP, yet another driver and RDBSS it seems that it is trying to access another kind of File. (cache, net?)

You will need to figure out the Object or Device Name to have a clue what might be going on,
you can do this by scanning the stack for strings.

You should check my explorer.exe hang where I capture the hang itself, use !analyze -hang -v and other commands to get more wise of the hang, the scanning helped me get to know what was wrong (something was rewriting C: to D:) and lucky someone showed me it was VCD doing this, I probably would've found it in the stack sooner or later... I guess something out of it might help you troubleshoot.

Had the same problem on a fresh install of WinXP Pro SP3. This thread is what fixed it for me:

http://www.msfn.org/board/topic/163751-windows-update-trouble/

Bottom line was installing this cumulative update took care of an issue that MS had created earlier that was causing the Windows Update to take forever:

http://www.microsoft.com/en-us/download/details.aspx?id=40390