Some steps you can take to support your online security and privacy include:
• Ensure your operating system(s) are current and up to date
• Use of a firewall
• Have up to date anti-virus and anti-malware software running on your device
• Ensuring your applications and any other hardware are updated where possible
• Use trusted and reputable software and vendors
• Treat unexpected or unknown emails with attachments and/or links with caution
There are increasingly sophisticated messages and scams that will try to trick you in to opening files containing ransomware that may then encrypt your entire computer demanding a ransom to decrypt it, or links that take you to sites to try and get you to provide log on details or to load compromised websites to further infect your machine.
• Use strong passwords
Avoid repeating passwords from other services or making minor incremental changes (such as adding 1, 2, 3..). This can be quite common, cyber criminals are prepared for that and will try passwords compromised from one service, on others used by the same client/person. Sometimes using a sentence can make having a longer password easier to remember.
Generally, the more layers of security you apply the better, and while some key points have been highlighted here, there are many others to be considered. You can find many appropriate solutions for the points listed above by consulting security vendors or online retailers for assurance from accounts.