Hello...
You should definitely add some on-demand scanners (HitmanPro, EEK, MBAM) and some addons to your browser (adblock, HTTPS Everywhere...).
Thanks for sharing!
Keep your browsers and softwares up-to-date. And do not use cracks and pirated softwares!
For your browser, you need µBlock to block ads in the browser and HTTPS Everywhere to make your connections secure. These two extensions are essential and available for your Chrome browser ( I predicted its our default browser)
You can use HitmanPro and Malwarebytes Free as a stand-alone malware scanner. These two will not conflict with Bitdefender IS. If you use USB often, maybe you should consider to use MC Shield USB Anti-MAlware Tool. All these softwares are free!
I hope these little words will help you to keep your PC clean for future and take a look at MalwareTips tips