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How to fix the common Internet Explorer error codes?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

There are a few common Internet Explorer error codes: 404, 502, and 504. These error codes mean that there was a problem connecting to the server, the server is unavailable, or the server is taking too long to respond. These error codes can happen for a variety of reasons, such as a bad connection, a busy server, or a slow server.

1. Check your Internet connection

  1. Open the "Internet Options" dialog box.
  2. Click on the "Connections" tab.
  3. In the "Active Connections" list, click on the "Details" button.
  4. In the "Details" dialog box, click on the "Problems" tab.
  5. In the "Problems" dialog box, click on the "Internet Connection Problems" link.
  6. In the "Internet Connection Problems" dialog box, click on the "Check Status" button.
  7. In the "Check Status" dialog box, if the "Internet connection is OK" message is present, then your Internet connection is working properly. If the "Internet connection is not OK" message is present, then there is a problem with your Internet connection and you need to fix it.
  8. To fix the problem, follow the instructions in the "Internet Connection Problems" dialog box.

2. Try opening the page in a different browser

  1. Open the "Tools" menu and select "Internet Options".
  2. Click the "Advanced" tab.
  3. Under "TCP/IP", click on the "Internet Protocol Version 4 (TCP/IPv4)" radio button.
  4. Click on the "Use the following DNS servers" button.
  5. Enter the server addresses of your preferred DNS servers in the "DNS Servers" text box.
  6. Click on the "OK" button.
  7. Close the "Internet Options" window.
  8. Reload the page in your browser.

3. Check your browser's settings

  1. In Internet Explorer, click on the "gear" icon and select "Internet Options".
  2. Click on the "Advanced" tab.
  3. Under the "Browsing" category, click on the "Settings" button.
  4. Under the "Internet Options" section, click on the "Advanced" tab.
  5. In the "Internet Options" window, click on the "Content" tab.
  6. Under the "Security" category, click on the "Settings" button.
  7. In the "Security" window, click on the "Advanced" tab.
  8. In the "Advanced" tab, under the "Security" category, click on the "Content" button.
  9. In the "Content" tab, under the "Security" category, click on the "Content Security Policy" button.
  10. In the "Content Security Policy" window, click on the "Edit" button.
  11. In the "Edit" window, under the "Policy Level" category, click on the "Advanced" tab.
  12. In the "Advanced" tab, under the "Security" category, click on the "Encryption" button.
  13. In the "Encryption" window, click on the "Set Level" button.
  14. In the "Set Level" window, under the "Security" category, click on the "Medium" button.
  15. Click on the "Save" button.
  16. Click on the "Apply" button.
  17. Click on the "OK" button.

If the answers above didn't work then you should also try:

  1. Clear your browser's cache
  2. Update your browser
  3. Reset your browser