MAC security & Team viewer


Sep 24, 2015
Hello all
for some stupid reason , I connected my MAC Laptop with a friend sometime ago to help me solve an issue with my MAC & upon his advice, I downloaded Team Viewer & he sorted everything for me. Afterwards I deleted the Team Viewer from my laptop, now, in 2 occasions when my laptop is idle, I can see the cursor moving on my screen, pages are opened and clearly someone is controlling my laptop. my question is : what I am supposed to do? given that I don't have any antivirus or any added security programmes in place- your kind help is much appreciated- thank U .