Dear Molotuff,
This is definitely adware but no tools are necessary here. Open task manager and find the running process called "Nine". Right click on it and select "open file location". I will probably be in C\Program Files (x86) but is also probably a "hidden" file so you will have to show hidden files to navigate to the offending folder. To show hidden files (in windows 10), double click "This PC", double click "Local Disk C" and under the "View" tab, select the "hidden items" box. Now you can see files that are hidden. This is one way that rogue adware (and other) files install themselves and drive the average user nuts because you cannot find the offending folder. Once you find the program, go back to Task Manager, right click the "Nine" process again, select "End Process" to stop the program running. You cannot delete a process that is running. Now simply delete the folder (in Program Files (x86) that is labeled "Nine" or contains the process called "Nine". That's it! Oh, and be more careful about downloading "free" software. Nothing is ever "Free". Best Regards