Install an antivirus. A great antivirus, Windows Defender, is included in Windows versions 8 through 10. Manually run a full scan of the system to get a good, clean baseline established. After this, ensure your antivirus is monitoring all files in real time.
Consider having an anti-spyware program to accompany your antivirus. We have had success with Malwarebytes.
Avoid clicking on banner ads that look questionable. If you don’t click on something or open it voluntarily, it is hard to get infected. Also, avoid clicking on any popup that claims to be your antivirus.
Don’t use outdated web browsers. We recommend using Chrome or Firefox, and they should self-update.
Stay away from sites that let you pirate content. These sites are often where customers get infections.
Be careful of where you download software. Many sites repack legitimate software with PUP’s (potentially unwanted programs). When you download software from a random site and then notice that other programs you did not intend to install appeared, these programs are called PUP’s. Be sure to download only from trusted locations. IE get Chrome from Google.
Be careful not to open attachments from people you do not know. Also, you should watch out for email attachments from people you do know. Their computer might be trying to spread a virus without their knowledge. You can always call someone before opening their attachment to be sure they were intending to send you something.
Scan all downloaded files before opening them; this is especially true of ZIP files and other compressed files.
Do not disable your firewall. Most operating systems have one enabled by default.
Keep windows updated. Malicious programs love to have unpatched holes in an OS that they can exploit.
Scan USB devices before using them.
Do not let a random person or company remotely login to your computer. People may call you claiming to be with Microsoft; absolutely do not let them into your computer.
Secure your network. Old encryption like WEP can be broken in real time. We also advise people not to broadcast their SSID (network name).
Do not use Wi-Fi that is not password protected. If you can access it without a password, so can everyone else.
Keep a good backup. If disaster strikes, at least you have your data.