What to Do Immediately If Your Computer Has Been Hacked

Think your computer has been hacked or compromised? Act quickly. Here are the immediate steps to take to limit the damage and secure your accounts.

Category: Security & Privacy | Read time: 3 min | By Midland Computers

Act Fast — Every Minute Matters

If you suspect your computer has been hacked, compromised by malware, or accessed without your permission, the speed of your response matters enormously. Here is what to do in the right order.

Step 1: Disconnect from the Internet

The very first thing to do is disconnect. Unplug your ethernet cable or turn off Wi-Fi immediately. This cuts off the attacker's access and stops any ongoing data theft or remote control. Do not reconnect until the machine has been cleaned.

Step 2: Do Not Turn the Computer Off Immediately

Contrary to instinct, turning the computer off straight away can actually destroy volatile evidence and make forensic recovery harder. If you need professional help, it can sometimes be better to leave the computer on but disconnected.

Step 3: Assess What May Have Been Compromised

Think about what was on the computer and what you were doing before you noticed the problem:

  • Did you click a suspicious link or download an unusual file?
  • Have you received warnings from your bank or email provider about suspicious logins?
  • Are files missing, renamed, or encrypted (ransomware)?
  • Did you give someone remote access to your computer (a common tech support scam)?

    • Step 4: Change Your Passwords — From a Different Device

    Using your phone or another computer (not the compromised one), change the passwords for your most critical accounts immediately: email, banking, PayPal, and any accounts you use regularly. Enable two-factor authentication on all of them.

    Step 5: Contact Your Bank

    If you do any online banking or shopping on the compromised computer, call your bank immediately. They can flag your account for suspicious activity and freeze transactions if necessary.

    Step 6: Seek Professional Help

    Once you have taken the immediate steps above, your computer needs a thorough professional clean. This involves removing all remote access software, scanning for malware, rootkits, and keyloggers, and in serious cases, performing a clean Windows reinstall.

    Midland Computers offers a dedicated [scam victim device cleanup service](/services/scam-victim-device-cleanup) specifically for people who have had their computer compromised. We also provide full [virus and malware removal](/services/virus-removal) for infected machines.

    Our technicians are experienced, discreet, and non-judgmental — these situations happen to everyone, and we are here to help.

    [Contact us now](/contact) or [book your repair](/book-repair) — getting your computer professionally cleaned is the most important thing you can do after a compromise.