Disable chrome's built-in automatic virus scanning of downloaded files

Try to start chrome with this switch:

--safebrowsing-disable-download-protection

although I don't know if it works. Grabbed it from here: http://peter.sh/experiments/chromium-command-line-switches/#safebrowsing-disable-download-protection

This answer was submitted more than 7 years ago and is not accurate with more recent versions of Chrome. This answer will not be updated since it was submitted to answer the author’s question which was asked in 2013.

Disable phishing and malware detection

1. Click the Chrome menu Chrome menu on the browser toolbar.
2. Select Settings.
3. Click Show advanced settings and find the "Privacy" section.
4. Deselect the "Enable phishing and malware protection" checkbox

Source