Use this method if you are unable to run a scan or update your anti-malware tool. You can also use this method if your usual anti-malware tool failed to fix the issue. If you can't use a web browser or connect to the internet on the infected PC, download the tool to a working computer, follow the download steps on a working computer.
You can then copy or burn the tool to removable media and insert that into the infected PC. Click Download. It's the red button near the center of the page. If you see a screen that displays recommended downloads, remove the check marks from each download, then click No thanks and continue to DirectX End-User Runtime Web Installer at the bottom-right corner. Save the tool to your computer.
Select the Downloads folder if not already selected, and then click Save to start the download. Copy the tool to removable media if you're using a different PC.
If you are downloading the tool on a different computer because you aren't able to do so on the infected one: USB drive: Connect the drive to the PC, then copy the tool the file that begins with "Windows-kb" and ends with ".
Double-click the tool. It starts with "Windows-KB" and ends with ". If the malware prevents you from running the tool, you'll need to run the tool in Safe Mode.
Click Next. A list of scan options will appear. Select "Full Scan" and click Next. This starts the scan, which may take several hours to complete. Alternatively, you can select Quick Scan to do a short scan of the areas of your computer most likely to contain malware. Review the results.
You'll see one of four possible results once the scan is complete: [2] X Trustworthy Source Microsoft Support Technical support and product information from Microsoft. Go to source No infection was found: The issue may not be malware-related. It's also possible that the tool hasn't been updated to include the latest malware. At least one infection was found and removed: Malware was found and successfully removed. Now that you're in the clear, make sure to update Windows as soon as possible.
An infection was found but not removed: This means the PC is infected, but the tool is not equipped to remove it. An infection was found and was partially removed: If you can, try to update and use Windows Defender to finish the job. Method 3. Restart your Mac in safe mode. To do so, hold the shift key before the Apple logo appears after clicking "Restart" from the Apple menu. Safe mode prevents software from starting automatically.
Locate the malicious app. Drag the app to the Trash. This will delete the malware from your computer. Empty the Trash. This will permanently remove the malware and prevent accidental recovery or execution. Method 4. Windows 10 and Mac come with built-in security features, including a built-in antivirus, a firewall, a warning when installing unknown apps, and process isolation.
Make sure that these features always enabled. Beware of fake anti-malware apps. If you're browsing the web and suddenly see a pop-up message that claims you have a virus or malware, do not follow the instructions on the pop-up—these are usually malware in disguise. Keep Windows up to date. New security patches and updates are added to Windows all the time. Keep your web browser up to date.
If your web browser notifies you that an update is available, install it immediately. Updates are often pushed through when security vulnerabilities are found.
Never call a fake technical support phone number. If you see a pop-up or window that demands you call someone to remove malware or regain access to your files , know that this is always a scam. No reputable anti-malware app will ever make you call someone to remove malware. Similarly, never trust someone who calls you on the phone to claim your computer is infected. Scammers will often try to convince you to pay money or bitcoin to fix a problem that doesn't exist.
Close the window or hang up the phone , run an anti-malware scan, and go about your day. Note that you will need to connect your computer to the internet to complete the following steps. Follow these steps below to learn how to clear your cache for Chrome and Safari.
If malware is set to load automatically, this will prevent the malware from loading, making it easier to remove. To avoid sharing your personally identifiable information, do not log into sensitive accounts while your device is infected. Luckily, malware scanners can remove many standard infections. But remember that if you already have an antivirus program active on your computer, you should use a different scanner for this malware check since your current antivirus software may not detect the malware initially.
Verify your default homepage. Follow these steps below to learn how to clear your cache for Chrome and Internet Explorer. If malware removal is unsuccessful, sometimes the only way to be sure your computer is free of malware is to entirely reinstall the operating system and your applications or programs from scratch. Before wiping your hard drive, backup all your files to an external drive and consult Apple support or Microsoft support before beginning the process.
Learn how to erase your startup disk prior to reinstalling MacOS in the steps below:. Follow the factory restore options. Windows gives you the option to keep your files or remove everything.
Use our best practices below to help protect your computer:. Malware is a dangerous threat to the data that computer owners store on their PCs and Macs. New types of malware are being discovered frequently, and the profitable nature of some types of malware can make it especially attractive to cybercriminals around the globe.
If you suspect your computer is infected, act as soon as possible to prevent the spread of malware and protect your personal information. All rights reserved. Firefox is a trademark of Mozilla Foundation.
App Store is a service mark of Apple Inc. Alexa and all related logos are trademarks of Amazon. Microsoft and the Window logo are trademarks of Microsoft Corporation in the U. The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.
Other names may be trademarks of their respective owners. Internet Security Center. How to remove malware from a Mac Step 1: Disconnect from the internet Disconnecting from the internet will prevent more of your data from being sent to a malware server or the malware from spreading further.
Step 2: Enter safe mode Safe mode, often referred to as safe boot, is a way to start your computer so that it performs checks and allows only the minimum required software and programs to load. Worms then spread automatically through email messages, networks, or operating system vulnerabilities, frequently overwhelming those systems before the cause is known.
Worms aren't always destructive to computers, but they usually cause computer and network performance and stability problems. A trojan horse is a malicious software program that hides inside other programs. It enters a computer hidden inside a legitimate program, such as a screen saver. Then it puts code into the operating system that enables a hacker to access the infected computer.
Trojan horses do not usually spread by themselves. They are spread by viruses, worms, or downloaded software. Spyware can install on your computer without your knowledge. Spyware can track Internet search habits and can also redirect your web browser to a different website than you intend to go to.
A rogue security software program tries to make you think that your computer is infected by a virus and usually prompts you to download or buy a product that removes the virus.
The names of these products frequently contain words like Antivirus, Shield, Security, Protection, or Fixer. This makes them sound legitimate. They frequently run right after you download them, or the next time that your computer starts. Rogue security software can prevent applications, such as Internet Explorer, from opening. Rogue security software might also display legitimate and important Windows files as infections.
Typical error messages or pop-up messages might contain the following phrases:. Do not click anything inside the dialog box. Are you sure you want to navigate from this page? Your computer is infected! They can cause data lost and file corruption and need to be treated as soon as possible. Return to System Security and download it to secure your PC. Press OK to Continue or Cancel to stay on the current page.
For more information see Protect yourself from tech support scams. Removing a computer virus or spyware can be difficult without the help of malicious software removal tools.
Some computer viruses and other unwanted software reinstall themselves after the viruses and spyware are detected and removed. Fortunately, by updating the computer and by using malicious software removal tools, you can help permanently remove unwanted software. For more information about how to remove a computer virus and spyware, see the following article in the Microsoft Knowledge Base: - Microsoft resources and guidance for removal of malware and viruses.
Note A computer virus may prevent you from accessing the Microsoft Update website to install the latest updates. We recommend that you set the Automatic Updates service to run automatically so that a computer is not missing any important updates.
Microsoft offers a free online tool that scans and helps remove potential threats from your computer. To perform the scan, go to the Microsoft Safety Scanner website. Note the name of the rogue security software. For this example, we'll call it XP Security Agent When you are prompted, use the arrow keys to highlight Safe Mode with Networking , and then press Enter.
Click the Start button and check whether the rogue security software appears on the Start menu. If it's not listed there, click All Programs and scroll to find the rogue security software's name. Right-click the name of the rogue security software program, and then click Properties. In the Properties dialog box, check the path of the rogue security software program that is listed in Target.
Note The folder name frequently is a random number.
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