Searching for "preregistered" or "cracked" versions of Malwarebytes Anti-Malware Pro (now known as Malwarebytes Premium ) carries several dangers:

Downloading software from unofficial sources using keywords like "preregistered" or "cracked" is a high-risk activity that can expose your PC to the very threats a security program is meant to stop. While the idea of a "portable" version is convenient, it is important to distinguish between official tools and modified versions that may contain hidden malware. The Risks of "Preregistered" and "Cracked" Software

: Cracked versions often require you to disable your existing antivirus or ignore security warnings, leaving your system completely vulnerable during installation.