Some times antiviruses are not enough. If you suspect that you are infected of some kind of spyware but your anti-virus, anti-malware, anti-anything are not able to detect it (this can happen) inspect internet connections made from your pc to external ips!
Open command line with administrative rights and execute the command: netstat -ban
This command will list all networn connections.
Click Start button and type in search box, resource monitor
A window will open, expand Network bar and inspect network connections.
Look for programs connected to the internet that you don’t recognize them or that Windows cannot recognize them. If a program is legitimate, it is likely that Windows will be able to recognize it, such as firefox.