SoftwareBundler:Win32/Stallmonitz is so malicious, has been used by cyber criminals to spread malware or Trojan. It, of course, can install unwanted software or extensions on target computer. Once infected by it, your computer will be messed up and haunted by risks.
This SoftwareBundler maybe distributes via freeware/shareware, vicious website, spam attachments, or other infections. As a result, when downloading software, you have to choose official and reliable site. When receipting emails, you have to make sure where it comes from. Certainly, you also should give your system a perfect protection and form the habit of fixing all system security vulnerabilities in time.