disk encryption major issue

Greetings,

I am having a serious issue with your software, which i downloaded and installed previously for testing purposes. I decided to encrypt my disk, but since it was going to take ages, i aborted the process. After a while, i installed comodo antivirus and i was prompted to reboot my computer. No serious issues up to this point. However, when i rebooted my pc, the windows splash screen didnt show up as expected, and i was prompted to enter a password. I tried to enter the passwrod i had previously chosen while encrypting the disk, but it would not grand me access to windows. I thought that it had something to do with bios password, so i removed the cmos battery. Again, the systems persists and prompts me to enter the password. This is so unconvenient, i would appreciate if you could possibly help me out with this one.