Check for Ghost devices by opening a command prompt and typing set devmgr_show_nonpresent_devices=1 then enter
Type start devmgmt.msc note: for Windows 2008 right click and run as administrator
In Device Manager, in the view menu , click show hidden devices then check your system volumes for any ghosted disk storage devices.
to remove: click unistall
In the Backup Exec GUI restart the Backup Exec services