ITunes 10 starting conhost.exe and it won't die

I updated to the latest version of iTunes about 3 weeks ago (haven't run it in over a week, due to this problem). Immediately after installing, I began seeing conhost.exe start multiple times. It took me a week to figure out which installed software was causing the issue, and narrowed it down to iTunes.
When iTunes runs (with or without its various services started), it starts conhost.exe. Whatever it is running in that console causes every other process that starts after conhost.exe starts to never end. I had taken to killing the conhost.exe processes, but they would simply restart when the iTunes services were running.
Basically, what this means is that when iTunes and related services were running in the background, HUNDREDS of processes that Windows starts and stops automatically would NEVER DIE. I once came home to find over 500 processes running, and before I figured out it was iTunes causing the problem, had to restart my computer every night when I got home, because the computer wouldn't respond. Each of those processes may have been small, but there were hundreds of them, taking up all available RAM.
In case anyone is curious (which I'm sure may happen), I'm running on a self-built Core 2 Quad 2.0GHz, 8GB of RAM, Windows 7 Ultimate x64, with somewhere near 3TB of storage space (approximately 60% of which is available). There are no current hardware issues, all drivers are up to date, and air flow through the case is taken care of by 8 case fans. Keeps my processor temps right around 100F (which is a lot cooler than they were over the summer).
The iTunes.exe version information says it is version 10.0.0.68. I know there's a 10.0.1 out now, but can't find out whether or not it resolves this issue.
Anyone have any ideas? This may be specific to Windows 7 x64; I haven't been able to find any solutions in my searching, both here and on Google.
Thanks.

Empty/corrupt library after upgrade/crash
Hopefully it's not been too long since you last upgraded iTunes, in fact if you get an empty/incomplete library immediately after upgrading then with the following steps you shouldn't lose a thing or need to do any further housekeeping. In the Previous iTunes Libraries folder should be a number of dated iTunes Library files. Take the most recent of these and copy it into the iTunes folder. Rename iTunes Library.itl as iTunes Library (Corrupt).itl and then rename the restored file as iTunes Library.itl. Start iTunes. Should all be good, bar any recent additions to or deletions from your library.
See iTunes Folder Watch for a tool to catch up with any changes since the backup file was created.
When you get it all working make a backup!
tt2

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