Best antivirus: Keep your Windows PC safe from spyware, Trojans, malware, and more

Antivirus software is nearly as crucial as a PC’s operating system. Even if you’re well aware of potential threats and practice extreme caution, some threats just can’t be prevented without the extra help of an AV program—or a full antivirus suite.  You could, for example, visit a website that unintentionally displays malicious ads…