PC Optimizer Pro is a rogue antivirus.
It also makes a fake "speedup", which installs more unwanted software (PUPs) and collects the user's information. Much like the now-viral and iconic adware BonziBUDDY, PC Optimizer Pro has received large amounts of attention after several high-profile internet live streamers examined and messed around with it, most famously Joel from Vinesauce. at times it is also misinterpreted as System Optimizer Pro. It also asks the user to pay for the license from them. When the website was blocked for a long time, PC Optimizer Pro created some mirrors.
It can be installed from various third-party software bundlers. While installing, it drops the following components to the C:\Program Files\Optimizer Pro or to C:\Users\<NAME>\AppData\Roaming\<randomletters>\:
It also creates a folder in the C:\WINDOWS\ directory, called "System64" and drops a text document called Bootfile.txt, which is used to collect the user's data.
It also scares the user with fake scan results, such as saying that the user has 1350 viruses even when the user doesn't have any malware at all. It then tells the user that they need to upgrade to the full version to remove the issues.
Due to the website having a call centre and a "technical support" number, many people have prank called them and recorded it on YouTube or streamed it on Twitch just to get the scammers mad, most notably Joel from Vinesauce in his "Windows 8 Destruction" stream. Technical support is not helpful and, like the software itself, is, in fact, a scam. They will hang up when asked how to remove the software from your computer.