Removing Viruses with a USB Flash Drive


Removing Viruses with a USB Flash Drive

Dan Steiner
Apr 26, 2013

Sometimes viruses can prevent a computer from starting up normally, or even in troubleshooting modes like Safe Mode. If you have another Windows computer and a USB Flash Drive handy, then you’re in luck! This process involves downloading removal software onto a blank flash drive using a second computer running any version of Windows

How USB Virus Removal Works

So uh, how does this work? Good question! One of the options built into your computer, even before Windows loads from the hard drive, is to boot from a USB Device. The goal is to copy virus removal software to the USB Flash Drive that will execute and kill the virus infection before it has a chance to load. We can do this a few different ways. We’ll cover 2 methods below that have a very high success rate.


What We Need For This to Work

– Working Windows Computer
– Blank USB Flash Drive
– Internet Connection
– Some Patience

Using Safe Mode with Command Prompt to Run Removal Software

This method is best used if you’re unable to run System Restore, but can still get into Safe Mode with Command Prompt. Make sure you have already copied the virus removal software that you’d like to run to your flash. Some examples of great software would be Rogue Killer and Malwarebytes Anti-Malware.

  1. Let’s Get Started

    Boot the computer back into Safe Mode by turning the computer all the way off. Once the computer is fully powered down, you can then turn it back on and immediately start tapping the F8 Key.

  2. Enter into Safe Mode with Command Prompt

    Once you’ve reached the Advanced Boot Options Menu, use your up and down arrow keys to select Safe Mode with Command Prompt, then press Enter.

  3. sm_cm_select

  4. Insert USB Flash Drive

    Insert your USB Flash Drive into the infected computer now.

  5. insert_usb_2

  6. Login and View Command Prompt Window

    The system will scroll a bunch of driver files, this is completely normal. Go ahead and select your user account to log in. You should then see the black command prompt window open. If not, you may want to try the second option below.

  7. Enter Commands

    With the command prompt open, we will need to type in the commands to open your USB Flash Drive. On most computers, the drive is assigned either E: or F:

  8. TIP: The easiest way to find your USB Flash Drive is to check drive letters until you find it. Keep in mind, the drive letters will rarely ever be C: or D:

  9. Find Drive Letter for USB Flash Drive

    When you find the correct letter drive, the command line will switch to show that letter. If you type in the wrong drive letter, you will get an error that says “The system cannot find the drive specified.”

  10. selected_usb

  11. View Files on USB

    Go ahead and start with your first letter guess (recommended E: or F:). Type directly in the command prompt E: (or whatever letter follow by a colon) then press Enter.

    When you think you’ve found the right drive, type in dir then press Enter. If you recognize the files on your flash drive, then you have the right drive. If not, simply start guessing drive letters again.

  12. cmd_dir

  13. Run Removal Software from USB

    Once you’ve found the correct drive and see the files on your USB Flash Drive, simply type in the exact name of the file you’d like to run, then press Enter. Now you can run whatever removal software is necessary!

If You’re Unable to Access Safe Mode

Sometimes viruses can even block access to troubleshooting modes like Safe Mode. We’re not out of options yet! This method will actually create a bootable USB that can execute even if a virus pops up. For this method, we’ll be using HitmanPro Kickstart for our virus removal software of choice.

  1. Set Up the USB Flash Drive

    Go ahead and turn on your clean windows computer and open up a web browser, such as Google Chrome, Mozilla Firefox, or Internet Explorer.

  2. webicons

  3. Download Virus Removal Software

    The program we’re going to copy to your USB Flash Drive is called HitmanPro Kickstart. It’s a very powerful program that makes it easy to create bootable USB devices. It’s free and very effective.

  4. HitmanPro with Kickstart

  5. Install HitmanPro

    Simply save and run the HitmanPro installer file. The HitmanPro interface should open fairly quick after running the file.

  6. Insert USB Flash Drive

    At this point, you’ll want to make sure your blank USB Flash Drive is plugged in and detected by your computer.

  7. Open Kickstart Interface

    In the bottom of the man HitmanPro screen, you’ll see a little icon of a guy kicking. Click on this icon to open the Kickstart interface. (Screenshot below)

  8. hitman_screen

  9. Install Software to USB

    You should now see your USB Flash Drive listed in the box. Go ahead and click it once to select it, then click Install Kickstart You will need to hit yes



  10. Insert the USB Drive into the Infected Computer

    At this point, we need to turn off the infected computer and insert the USB Flash Drive.

  11. Note: Please make sure the infected computer is completely powered off. Standby mode and hibernation mode will not work.

  12. Boot to USB Drive

    This can be a tricky part depending on the computer. Quickly after pressing the power button, you will need to press a key to get into the BIOS or Boot Options Menu. Every computer and manufacturer are slightly different, so you’ll need to watch the onscreen text to see what button to press. Set your computer to boot from the USB Flash Drive.

  13. Note: Generally, to access the boot menu of your BIOS you usually have to press either Esc, F8, F11 or F12 depending on the manufacturer of your BIOS.

Author: Dan Steiner
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Removing Viruses with a USB Flash Drive
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One Comment

  1. Regarding removing viruses with a USB drive and Hitman Pro from your blog dated April 26,2013:
    Can it be used to remove what might be called Loadmoney. Each time that my daughter starts her laptop, a Notepad popup appears with the name “Loadmoney”. There are 4 layers of the same popup. The installed anti-virus and anti-malware programs will not open and I am not able to download any online scanners from the well known sites.

    Will your method as described in the blog be able to discover and clean the problem?

    Please reply soon. Thank you.

    P.S. Have you been to Bishop’s Peak?

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