I Agree with hang-the-9
Typical antivirus scanners are less likely to detect RATs because of binders and intruder encryption routines. If you think your system affected with Trojan then firstly
Step 1: Open task manager of your system by pressing Ctrl+Shift+Esc then find the Trojan process and stop it.
Step2: Open your systems control panel and uncheck on hide protected operating system files.
Step 3 : Open your systems registry editor by pressing (Windows+R) key and then type regedit in the RUN window
Step 4 : find all Trojan related registry value and delete them.
Step 5 :Now perform a complete system scan with your antivirus program
Step 6 : If you didn’t have any commercial antivirus program in your system for Trojan virus infection then , consider free ones from Malewarebytes, Immunet ,Avast, Avira or McAfee to prevent future infections.