The most used application on most computers and your gateway to the Internet can also be a gateway into your computer for hackers if not properly secured. Using a secure browser like Firefox or Chrome helps ensure your computer and information is protected.
Considering so many data breaches every year, your passwords are no longer safe. A Password Manager will help ensure you use secure, random passwords and do not use the same password twice. You can check your email address at haveibeenpwned.com to see if you have been involved with a data or password breach in the past.
There are many indicators that you might be looking at a phishing or scam email. Even an email from someone you know may be a phishing email if they fell for it first.
Don't risk losing all your pictures and documents. Encrypt, backup, and track your device so you don't lose you information.