I just had my mind blown - User running Outlook 2010, the offline address book wasn't updating. I moved the *.oab files and tried downloading the address book. It progressed about 5% and stopped on Copying Offline Address Book Template File. After some Google-fu I found the answer in an Exchange forum where the wireless mouse driver was causing the problem. I read the answer with skepticism, but after I had the user remove the wireless adapter from the USB port it worked. I still can't believe it caused the problem. Just passing it on...
-Paul
