1. Use a firewall.
2. Install antivirus software.
3. Install an anti-spyware package.
4. Use complex passwords.
5. Keep your OS, apps and browser up to date.
6. Ignore spam.
7. Back up your computer.
8. Shut it down.
9. Use virtualization.
10. Secure your network.
11. Use two-factor authentication.
12. Use encryption
And you should aware the 10 most common cyber attack types:
1. Denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks
2. Man-in-the-middle (MitM) attack
3. Phishing and spear phishing attacks
4. Drive-by attack
5. Password attack
6. SQL injection attack
7. Cross-site scripting (XSS) attack
8. Eavesdropping attack
9. Birthday attack
10. Malware attack
https://blog.netwrix.com/2018/05/15/top-10-most-common-types-of-cyber-attacks/
If you are concerned about your password for wallet, keep it somewhere else, store it like paper wallet.
I format my PC every six months so that it would be clear of unwanted malware that may infiltrate my PC, is this advisable? Not an IT guy here.