User machine is Windows 7 32bit, server is 2K8R2.
I have a user who will have her network drives disconnected (big red x). Double clicking them gives:

Locking/unlocking will work at times, restarting helps for a while, but resetting her password and ticking "unlock this account" will fix it for a day or two. It seems like her account is being locked out, but she is still able to log into her PC, and others that don't have her credentials cached. Outlook connects to exchange without problem.
I have looked for her account as a service to no avail, and I've tried using Lockout Fixer and similar other tools.
Any help finding what is locking her account, if that's what's happening, or other suggestions for things to try?