My download test runs successfully, but why does my upload test fail?

• Check firewall or security software on your system as they could be interrupting test traffic. Sophos, Symantec, and McAfee are types of security software installed on your computer/laptop. You could temporarily turn off firewall or security software to see if it makes a difference in your upload test results. Make sure to turn them back on after running the test.
• Are you behind a proxy server? If you are behind a proxy server or firewall, you may experience problems with inaccurate upload test results. In that case please test with different browsers. Also, remember that different browsers generate slightly different results because different browsers have different HTML5 implementation.