I've got a Dell M4400, Win 7x64b Ultimate with bitlocker.
I unfortunately yielded again to the tweaking demon and upgraded to a SSD.
Previously, at preboot, I had no option to log in with fingerswipe. I entered a password, it booted, and then I could swipe my finger or enter the Windows password to complete the boot. I also had the option of authentication with the bitlocker key on my usb thumbdrive.
Now that I've reinstalled the operating system (did not record all of the option choices I made), I have the following problematic behavior at preboot.
I now have two choices at poweron. screen instructs to swipe finger or press esc to use password.
If I swipe my finger successfully, I get the windows login screen. here I can swipe or enter a password.
If I press esc, (as when the printreader doesn't recognize my finger, or if I don't us it at all and just start by pressing esc), I'm told that pre-boot authentication has failed. I then enter password; invariably, at this point, bitlocker requests the entire key, and I can't use the thumbdrive, either.
Dell premium support punts to Wave; Wave tried then gave up and told me to register more fingers.
Thanks for ideas. I wonder if there is something that can be done with manage-bde.exe.