Have just an AV is not enough for your pc or laptop...
coz some AV can't detect a new virus such a trojan,adware n others..
so..Malwarebytes is the best for you to install ..
Malwarebytes is a site dedicated to fighting malware. Malwarebytes has developed a variety of tools that can identify and remove malicious software from your computer. When your computer becomes infected, Malwarebytes can provide the needed assistance to remove the infection and restore the machine back to optimum performance.
wanna try it???
download it !!!