Below is how to check if your computer has been hacked.
New programs installed.
If you are the only user using the computer and new programs are installed, it could be an indication that your computer has been hacked.
How to check if your computer has been hacked through backdoor or Trojan
These are the most common programs installed on a computer after it has been hacked. These programs can allow hacker to gain access from your computer.
This chatting program is a common way for a hacker to get into your computer.
How to check if your computer has been hacked with malware
They are a sign that your computer has been infected via download or visiting a hijacked page on the internet.
Your online passwords have changed.
Email spam being sent.
Hackers will use that account to spread spam and viruses.
Increased network activity.
When hacker is remotely connected to your computer, your internet connection will be slower. And sometimes, your computer becomes a zombie to attack other computers.
Unknown programs requesting access.
You can use computer security programs and firewalls to help you restrict access for security purposes.
Your security programs uninstalled or disabled.
Your computer doing things by itself.