Sandboxie and Bitdefender do not play well together (as Sandboxie warns). So is it better to keep Bitdefender Internet Security 2017 and forget about Sandboxie or should I uninstall Bitdefender and Sandbox my browser and downloads folder? If the latter, are you okay with no Antivirus or do you recommend a different one in place of Bitdefender?
Antivirus is covered in volume 4. AV has limited use but is still useful if you make mistakes and the virus is old. I would suggest you watch volume 4 and see what you think. Its more about your own behavior. If you don’t do silly things you don’t need AV. But with windows you can use the native AV or another product.