How to Fix a Hacked Computer? 🖥️ What To Do?

My Computer’s Been Hacked! Now What?
My Computer’s Been Hacked! Now What?
Written by Emma Davis

Unfortunately, computer hacking is common these days.

Indeed, according to Security magazine, a hack occurs somewhere in the world once every 39 seconds. And cybercrime generates more money than the illegal drug trade – a report from the Herjavec Group estimates that cybercrime will cost the world over US$6trillion in revenue by 2021.
Emma Davis
Emma Davis
IT Security Expert
It is better to prevent, than repair and repent!
These days computer hacks areas are shared as weather changes. Today feels sunny and safe, but tomorrow could be completely different. Luckily, Gridinsoft is here to safeguard your computer against all types of digital threats. It's a unique fusion of protection software and human intelligence on-demand, 24/7. So download Gridinsoft Anti-malware and make sure your digital life is safe.
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So, if you’ve been hacked, you’re not alone. But, unfortunately, being the victim of a computer hack is – at best – awfully inconvenient. So, here are the steps to minimizing that damage.

Firstly, let’s look at signs that you might have been hacked…

Signs your computer has been hacked

You might recognize suspicious events when you see them, a general sign that something’s not right and your computer or internet browsing is not operating as it should.

If your computer is hacked, you might notice some of the following symptoms:

  • Google searches are redirecting to sites you didn’t intend to visit. Products within this classification are considered to be PUAs (Potentially Unwanted Applications), as they usually infiltrate browsers/systems without user permission. While redirects to may seem as something innocuous, especially if it is users’ preferred search engine, browser hijackers are infamous for their data tracking abilities.
  • Programs show up you didn’t install. A malicious program may be disguised as legitimate software to slip into your computer. Usually, it is done by worms or malware that attach to other software to get installed together as a bundle. So, if you notice an unknown program residing on your system, it’s likely a malicious one.
  • Antivirus shutting down. Some types of malware disable your antivirus or anti-malware programs and make it difficult to re-enable them. If you notice that your antivirus has suddenly stopped working and you can’t open the Task Manager properly, it is very likely that your system has been infected with malware;
  • You see suspicious pop-up ads, such as antivirus warnings, or suspicious downloads. This is one of the most explicit indications of a computer being infected. If you start seeing more annoying pop-ups in your web browser, and they often flash in sites that usually don’t generate pop-ups, this is a bad sign.
  • People on your email contact lists receive spam that you didn’t send. If a virus has compromised your email, it might be trying to spread further by sending malicious emails to your contacts. It doesn’t automatically mean that your computer has been hacked. However, if the fake email includes your name and email address, it is likely that your system has been infected.
  • Your computer slows down or freezes.

You notice rogue, third-party activity ranging from the minimal (keyboard strokes, your mouse moving) to the very big (money taken from your online bank or credit card account).

Reasons why you were hacked in the first place.

Hackers, like any criminals, are opportunists. But, just like a shop window left open or a bag left unattended, some online activities leave you vulnerable to hacks.

For safer browsing, you should:

  • Avoid opening suspicious email attachments;
  • Make sure your operating system (OS) is up to date: you’ll be regularly informed of your phone or computer updates. Please don’t put off installing these updates as they help keep your device’s security current;
  • Use strong passwords, including numbers, letters, and punctuation – and not your mother’s maiden name! (We have a guide to creating more secure passwords if you’d like to know more.)
  • For more on safe browsing, check out malware guide.

I have been hacked! How do I fix it?

Okay, firstly, don’t panic. Nothing harmful may have happened yet.

And secondly, you can probably mitigate anything terrible that has occurred.

Here’s what to do…

  1. Reset your passwords

    This might seem onerous at first – you have a lot of passwords after all! But focus on the key places; social networks (Facebook, Twitter, Instagram), emails, devices (phone, laptop, and so on), and anywhere involving credit cards and finance (shopping, banking).

  2. Log out of all online accounts

    After you’ve reset passwords, log out. It’s easy to forget that we tend to have our social media (and other online accounts) set to log us in automatically.

  3. Disconnect from the internet

    Next, shut down contact to the internet: that means turning off Wi-Fi on your computer and switching phones and tablets to airplane mode.

  4. Remove external hard drives

    Remove any external drives. This means USB sticks or external hard drives. Be sure to “eject” them first. (Go to the appropriate folder, then click “eject”).

    If you’re sure you’ve been hacked, you might want to remove the computer’s hard drive too. First, back up any files you have (you can even save them to the cloud, like Google Drive or email small files to yourself); switch off all power sources; then once the computer is shut down, you can remove the hard drive (the big black rectangle within your laptop). Its location will vary depending on make or model, so consult the manual (hard copy or online) or, if you’re not comfortable doing this, find an IT professional to help.
  5. Scan your computer for malware and viruses

    This can be done with your own devices’ security software or with third-party security. For more information on running a scan, check out our guide to getting rid of viruses.

  6. Wipe your hard drive (if necessary)

    If your scan reveals a virus or hack, you can (and probably should) wipe your hard drive, then reinstall your OS. Brushing means to erase permanently, so be aware that whatever you’re deleting will be gone for good unless you back it up.

    Do not just manually delete files: they’ll still exist somewhere in your hard drive. Instead, use a downloadable program to carry out the wipe. Like a virus scan, a wipe will let you know when it’s been carried out thoroughly.
  7. Spread the word

    Unfortunately, your hack might have affected people in your contact list: friends and families might have been emailed by a hacker posing as you. If that happens, it’s important to contact those who have been emailed or texted to let them know you weren’t behind the message and may have been hacked.

    And if your hack was the result of clicking on a suspicious email or attachment, it’s a good idea to warn others of the attack. Similar hacks tend to happen in waves, as multiple victims are contacted at a time.
  8. Closely monitor your credit and financial accounts

    After the hack, keep an eye on your online expenditures, regularly checking your bank and credit card accounts.

  9. Install security software

    Naturally, up-to-date, reputable security software is the best line of defense against a future hack.

How to avoid being targeted by computer hackers again

Anyone can fall victim to a hack, but there are ways to minimize the risk.

Step 1: Read up on how to detect online scams

Sadly, hackers are always looking for ways to breach security. So it’s a good idea to keep on top of unwelcome trends related to hacking, phishing, and other forms of attack.

Step 2: Maintain strong passwords

Remember to keep strong passwords and to change them regularly. For example, include a combination of numbers, letters, and punctuation and try to use different passwords for your various online accounts.

Step 3: Don’t leave your devices unattended in public

Even two minutes is enough for a hacker to gain personal information or sow the seeds for a later hack.

Step 4: Keep files backed up

It’s good practice to maintain essential or sensitive files beyond your computer, ideally in multiple places, USB, external hard drives, cloud storage, or if you’re feeling especially cautious, all of the above.

Step 5: Ensure your firewall is configured correctly

You should have a firewall installed on your computer. A firewall in a building is a sealed wall that prevents the spread of fire. On your computer, it works the same way.

You can configure your firewall to block communication between your computer server and another. This firewall block could filter based on suspicious IP addresses (other specific servers), potentially dangerous phrases, or websites.

We have several articles about safer online activity, covering everything from getting rid of a computer virus to a comprehensive guide to malware.
Emma Davis
Emma Davis
IT Security Expert
It is better to prevent, than repair and repent!
When we talk about the intrusion of unfamiliar programs into your computer's work, the proverb "Forewarned is forearmed" describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.
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About the author

Emma Davis

I'm writer and content manager (a short time ago completed a bachelor degree in Marketing from the Gustavus Adolphus College). For now, I have a deep drive to study cyber security.

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