Antimalware Doctoris a rogue anti-spyware application. This program acts like a legitimate security program, but it displays fake alerts and warning messages to scare users. Pushing them to buy a license.
If your computer is infected with Antimalware Doctor use MBAM to remove the infection or follow Bleeping Computer's removal guide.
To help removal, you can register the rogue with the following serial: MTk4-NzE1-NTYx-NTUw