Unwanted File Download: What to do

TL;DR

Buzzfeed (or another website) downloaded a file without your permission? Don’t panic! This guide helps you find the file, check what it is, and remove it safely. We’ll also look at how to prevent this happening again.

1. Find the Downloaded File

1. Check Your Downloads Folder: The most likely place. Look for a recently added file with an unusual name or no extension (e.g., just ‘file’ instead of ‘file.exe’).
2. Look in Recent Files: Windows keeps track of recent files. Press Win + R, type recent and press Enter. This opens a folder showing recently opened/saved files.
3. Browser Download History: Each browser has its own download history.
   • Chrome: Type chrome://downloads in the address bar.
   • Firefox: Press Ctrl + J or go to Menu > Downloads.
   • Edge: Press Ctrl + J or go to Menu > Downloads.

2. What *is* this File?

Before deleting anything, figure out what it is. Deleting the wrong file could cause problems.

1. File Extension: The extension (e.g., .exe, .pdf, .zip) gives a clue. Be very cautious with .exe files – these are programs that can run on your computer.
2. VirusTotal Scan: This is the best way to check if a file is malicious.
   • Go to https://www.virustotal.com/gui/home/upload
   • Upload the downloaded file.
   • VirusTotal scans it with many different antivirus engines and shows you the results. If multiple engines flag it as malicious, do not open or run it!
3. Right-Click Properties: Right-click the file and select ‘Properties’. Look at the ‘Details’ tab for information like file type, size, and creation date. This won’t tell you if it’s malicious, but can help identify what kind of file it is.

3. Remove the File (Safely)

If VirusTotal flags the file as dangerous or you’re unsure about its purpose, remove it immediately.

1. Delete to Recycle Bin: Right-click and select ‘Delete’.
2. Empty the Recycle Bin: Right-click the Recycle Bin icon on your desktop and select ‘Empty Recycle Bin’. This permanently removes the file.
3. If you can’t delete it: Sometimes malicious files lock themselves.
   • Restart Your Computer in Safe Mode: Restart Windows and repeatedly press F8 (or Shift + F8) during startup to access Advanced Boot Options. Select ‘Safe Mode’. In Safe Mode, try deleting the file again.
   • Use a Malware Scanner: Run a full scan with your antivirus software or a dedicated malware scanner like Malwarebytes (https://www.malwarebytes.com).

4. Prevent Future Downloads

Stop this happening again by adjusting your browser settings.

1. Disable Automatic Downloads: Most browsers allow you to disable automatic downloads.
   • Chrome: Settings > Privacy and security > Site Settings > Automatic downloads. Choose ‘Don’t allow sites to download multiple files automatically’.
   • Firefox: Settings > Privacy & Security > Permissions > Downloads. Uncheck ‘Allow sites to download files without asking’.
   • Edge: Settings > Cookies and site permissions > Downloads. Toggle ‘Ask me before downloading’ to On.
2. Be Careful What You Click: Avoid clicking suspicious links or buttons on websites, especially those promising free downloads or offering unrealistic deals.
3. Use a Pop-up Blocker: Block pop-up windows that often contain unwanted download links. Most browsers have built-in pop-up blockers.

5. Check Your cyber security Software

Make sure your antivirus and firewall are up to date and running correctly.