PC Speed Maximizer is a paid fake system optimizer program and rogue antivirus on Microsoft Windows that is typically added when you install another free software (video recording/streaming, download-managers or PDF creators) that had bundled into their installation this program. Very often users have no idea where it came from, so it’s not surprising at all that most of them assume that PC Speed Maximizer is a virus. This program is also bundled within the custom installer on many reputable download sites like Download.com and Softonic, so if you have downloaded software from these websites, chances are that PC Speed Maximizer was installed during the software setup process.
PC Speed Maximizer is technically not a virus, but it does exhibit plenty of malicious traits, such as rootkit capabilities to hook deep into the operating system, browser hijacking, and in general just interfering with the user experience. Industries generally refer to it as a PUP.