How do I remove a virus and malware from my computer?

Updated: 11/13/2018 by Computer Hope

If you're concerned about a specific file being a virus, see our verifying if a file is a virus document.

Virus detection and removal

Computer Virus

If you believe your computer or storage device, like a USB flash drive, is infected with a virus, the best method of detection and removal is to run an antivirus scan on the computer. Open your antivirus scanner through the Windows notification area or through the Start menu and run a full system scan to scan all files on your computer for a virus.


By default, antivirus programs usually scan the primary hard drive on a computer and not other storage drives, like USB flash drives. Access the settings in your antivirus program and make sure it is set to scan all drives connected to the computer.

If you're unable to boot into Windows, boot the computer into Safe Mode and run the scan from within Safe Mode.

Removing detected virus

If the antivirus program detects the virus, a prompt to either move the virus to the virus vault or delete the infected files will be given. Both options are a good way to remove the virus from the computer.

I don't have an antivirus program installed


If you are running Windows 8 or Windows 10 on the computer, you may be using Windows Defender as your antivirus.

If you do not have an antivirus or Windows Defender, but still believe a file is infected with a virus, try running an online virus scan. These websites will scan your computer hard drive for any infections. You may also consider installing a free antivirus program on the computer.


It is not recommended to manually find and delete files on your computer that you suspect to be infected with a virus. Deleting the wrong files could result in errors on your computer, or cause the operating system to become unusable.

No virus is detected

Unfortunately, many non-virus related issues are often blamed on computer viruses. Nine times out of ten, a computer problem is a software, driver, or hardware-related issue and not a virus. If after running the antivirus, no virus is found, it's very likely the computer is not infected. If you still believe your computer is somehow infected, you may also consider running an online virus scan and scanning the computer with a malware protection program, as mentioned below.

Malware, Spyware, and Adware detection and removal

We'd also recommend running a malware protection program on the computer, such as Malwarebytes. Malware can be the cause of computer errors and other problems as well.

How to scan the computer or get software if the Internet is not working

If your Internet is not working, you can follow the following steps to get a protection program on your computer.

  1. Download antivirus software, such as Malwarebytes, onto another computer. Then, transfer it to a USB thumb drive, and use the thumb drive to run Malwarebytes on the infected computer.
  2. Copy the download to a USB flash drive.
  3. Install the program from the flash drive on your computer.