Using someone else’s USB flash drive in your computer may be extremely dangerous because you don’t know how the other person’s system is protected. The other person may not have Avast Antivirus installed and USB sticks are usually an easy way to catch an virus infection. To catch such malware infection your computer doesn’t even need to have an Internet connection.

Therefore we strongly suggest to run the Avast scan for removable media to make sure the inserted USB flash drive is clean. Steps to perform this scan are very simple and really everyone can make it.

1. Insert the USB Flash Drive and Open the Avast Interface

Insert the USB stick into your computer. Wait after all drivers are installed, and make sure you see it as an additional drive in the system. Do not copy/execute any files before you finish this scan procedure.

Then go to your Avast interface by double-clicking on the orange icon in the Windows system tray. Or you can find Avast in the Windows Start » All Programs » Avast.

Once you’re in go to ‘Scan’ in the top menu, and select ‘Scan for viruses‘ from the drop-down menu.

Scanning the USB Flash Drive with Avast Antivirus 2016 – Scan Selection

Scanning the USB Flash Drive with Avast Antivirus 2016 – Scan Selection

Once the Scan page will appear, select ‘Removable media scan‘ from the drop-down menu in the middle.

Scanning the USB Flash Drive with Avast Antivirus 2016 – Scan Selection

Scanning the USB Flash Drive with Avast Antivirus 2016 – Scan Selection

Before you start the actual scan, we recommend to adjust its settings a bit, so no virus or malware on the USB is missed.

2. Tweak the USB Scan Settings

By default the scan settings are quite loose. We will make them as strict as possible so no virus on the flash drive will escape!

Click on ‘Scan Settings‘ » ‘Scan‘ and scroll down to check option ‘All files‘. The move to ‘Sensitivity‘ page and set ‘Heuristics‘ level to ‘High‘ and check option ‘Test whole files (may be very slow for big files)‘.

Scanning the USB Flash Drive with Avast Antivirus 2016 – Increasing Scan Sensitivity

Scanning the USB Flash Drive with Avast Antivirus 2016 – Increasing Scan Sensitivity

Then move to menu item ‘Packers‘ and check option ‘All packers‘ to include all archive types in the scan. Confirm by clicking on the ‘OK‘ button.

3. Run the USB Scan and See the Results

Now everything is set, so just click on the ‘Start‘ button and wait until the scan is finished. Since we have set a strict settings it may take a while.

After the scan is complete you will see the results. If there is no danger, you will see a green message saying ‘NO THREAT FOUND‘. Then you can go ahead and start using the scanned USB flash drive.

Scanning the USB Flash Drive with Avast Antivirus 2016 – Checking the Scan Results

Scanning the USB Flash Drive with Avast Antivirus 2016 – Checking the Scan Results

Additional Notes

Although we have used Avast Free Antivirus 2016 screenshots in this article, these steps are also applicable for all Avast Antivirus solutions (i.e. also for Avast Pro Antivirus, Avast Internet Security, or Avast Premier) running the latest version available.

Steps are relevant for all Windows versions – Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10 (including Anniversary Update).

Written by Paul B.

My name is Paul and I love Avast since the Home Edition v4.8 (2008). I am recommending it to all my friends, but I realized they don't know how to use it. So I started this site in order to help others getting maximum from this awesome antivirus. Feel free to contact me via Facebook, comments below or this form.

This article has 4 comments | Did we miss anything? Just let us know in the comments!

  1. Suresh Reply

    How i enable automatic scan while insert pendrive or any other usb device into my computer in windows 7?

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