The part where it looks like your xp stuff and vista stuff switch drives is normal. Only the Operating System associates the hard drives by letters this does not mean your hard drive files are switching. This happens because D: drive is Root of Vista OS and Root of any OS in windows gets the C: drive lettering.
dwwin.exe, drwtsn.exe dll is the "Microsoft Application
Error Reporting" tool.
I think the message means that something is crashing during system
shutdown. When the crash occurs the OS launches dwwin.exe to report the
error, however the windows operating system is shutting down and so the
application can't launch make the system lockup or hang.
Your problem isn't with dwwin.exe, you need to find out what is actually crashing at shutdown.
If you can`t find out what it is, try going to Administrative
Tools/Services and disable the “Error Reporting Service”. You don`t
want that running anyway.
Also right click My Computer
Put a check at both
Disable Error Reporting
But notify me when critical errors occur
Then, if that was the cause and the message stops, we`ll have to try to identify the cause.