Boot still asks for password after decrypting and uninstalling CDE

I encrypted an external hard drive with CDE, and chose a password that asked when booting. However, after decrypting the unit and uninstalling CDE, the boot still asks to enter the password. I just press enter and log in, even thought many times i have to shut down the notebook, because the system freezes. How can i remove asking to enter the password for good?

Thanks a lot

you have to repair your MBR.