It may help to look at the minidump files from the crashes with a debugger.
Can you zip up the minidump files in the C:\Windows\Minidump folder and make available (provide link) via Windows Live SkyDrive or similar site?
The following link has information on using Windows Live SkyDrive:
http://social.technet.microsoft.com/Forums/en-US/w7itproui/thread/4fc10639-02db-4665-993a-08d865088d65
If you have problems zipping the minidump files copy the minidump files to another location such as a folder on the Desktop
Also, you do not necessarily have to zip up the minidump files, you can upload them one at a time.