Not the definitive collection of technical advice for your computer, but a good place to start.

If you have more links that you think others will find useful  then please send them to me.

PC Safe
Site Name/LinkDescription
Fraud OnlineFraud Online - includes a list of common internet scams to keep an eye out for. It even has a spot a scam page that highlights the most common online scams.
Digital SafetyDigital Safety - a more general informational guide to internet safety but has specific sections on common safety concerns; it covers social media use, keeping kids safe online and password security.
Scam WatchScamwatch is run by the Australian Competition and Consumer Commission (ACCC). It provides information to consumers and small businesses about how to recognise, avoid and report scams.
eSaftey HomepageGovernment website to provide assistance with reporting, protecting, and awareness of on-line abuse and issues
Staying-safe-onlineAustralian Communications and Media Authority information on staying safe on-line, and what you can do if you have been stung.
Windows 10 Repair & RecoveryMicrosoft advice on fixing issues with your Windows 10 PC. Like how to boot into safe mode etc.
Official Apple Support siteApples "How to" for all things Apple.
Relcaim your Privacy in Windows 10PCWorld article on how to prevent Microsoft from having more access to your Windows 10 machine than experts are happy with.
Book your dataA Collection of Computer Security and Safety Tips
No more RansomeIf you are already infectect with Ransom ware, this site maybe able to help you. This site is run by several anti virus companies.
Advice on buying a LaptopThis article talks you through a lot of the jargon and provides good information on what to look for in a new laptop (that will suit you not the sales man).
https://www.certstaff.com/classes/computer-internet-safety-kids.htmlComputer and Internet Safety for Kids (useful to advise your Grandchildren and understand the net from their point of view).