4. Passwords aren't functioning for some reason.
If you suddenly lose access to your computer, it's not because you've forgotten anything; your device may have been hacked and your security breached.
A hacker may have gained access to your computer and changed the login data for your account, including your password. It might become worse by thereby indicating that your data was stolen from your devices or another source, such as a hacked retailer, bank account, or online merchant.
Keep an eye out for suspicious online behavior or purchases that you haven't authorized.
