The Data File section of the built in Windows 7 Backup fails with the following error. The backup was not successful. The error is: The requested system device cannot be found. (0x80073BC3). If only the System Image is selected backup succeeds. If any directories selected with the Data File section, backup fails. Uninstalled HFS+ driver, and backup works with all user directories selected, installed HFS+ driver again and backup fails. Windows 7 also hangs on boot if an external Firewire NTFS drive is plugged in on the MacBook Pro. No hang if driver is removed. This occurs on both a MacBook Air late 2010, and a MacBook Pro early 2011 running OS X Lion and Windows 7 SP1 with BootCamp driver vserion 4.0. Both patched to date. Reported to Support and so far no useful feedback. Tried latest driver suggested with same result including a BSOD when trying trying to remove uninstall driver.