And there you have it. Everyone will give you different advice all good in it's own way but never the less confusing. I am going to assume you are using Windows 10 on your new computer. As long as that is the case you already have a perfectly good antivirtus preinstalled called Windows Defender. you also have a resonable Internet browser called Edge preinstalled. I will admit that I do not like Edge (or Chrome) I tend to use Mozilla Firefox. The problem is that all this stuff needs to be downloaded from the net and installed which can be confusing. You haven't said whether you are a new computer user or not but I am assuming that if you have to ask this question then you are. As said stay away from dodgey websites, although, apart from porn sites, how would you know? Do not open attachments from emails that you do not know the originator of. Use Malwarebytes once a month. Most importantly do not think that anti-virus or anti-malware programs are the be all and end all of computer security. Computer security is down, in a very large part, to your own vigilance and common sense. In spite of what the anti-virus program vendors tell you NONE and I mean NONE in capitol letters is 100% safe. Ensure that all your personal files are backed up somewhere other than your computer and if you are using external drives unplug them when they are not in use. If you are using network attached storage (NAS) then security can get complicated.