This week, we reported on one of the glaring issues with the PC version of the 1.09 patch. In this patch, there was also a so-called “rootkit” that was involved in the anti-cheat system implemented by Capcom. Due to community backlash, Capcom has had to change their course of action.
Thankfully, Capcom built a tool to help users to remove the offending file from the 1.09 patch on PC. Removing the file will help secure your computer and prevent people from maliciously using your computer without your knowledge. Given the brevity of what was installed in this patch, it is strongly stressed that you should download the tool from Capcom and take the necessary steps to remove this file.
The tool to remove the unnecessary files from the update (V 1.09) for the PC is now live. Thanks for your patience. https://t.co/cAPyCg7X0h
— Street Fighter (@StreetFighter) October 1, 2016
Source: Street Fighter (Twitter)