You will need to install the Securly SSL certificate on your Windows machine to ensure that Securly is able to filter all HTTPS sites browsed there effectively.

An executable file and installation video that shortens the process is also available here.

If you want to install the Securly SSL certificate manually, follow the process below:

Download the certificate attached at the end of this article.
Right-click on "Start" and select "Run".
Type in ‘mmc’ and click on ‘OK’.
On the "User Account Control" screen, click on "Yes."
Once the Microsoft Management Console opens, click on "File" and select "Add/Remove Snap-in".
In the left menu, select ‘Certificates’ and click on 'Add'.
On the next screen, click the radio button next to "Computer account" and click on "Next".
Click on "Finish".
Once you have returned the. To add or Remove Snap-ins and screens, click on "OK".
In the Microsoft Management Console window, click on "Certificates (Local Computer)".
Right-click on the "Trusted Root Certificate Authorities" in the left pane and select "All Tasks" and then "Import".
Click "Next" in the "Certificate Import Wizard".
Browse to where you saved the Securly certificate and select it. Then click on "Open".
In the Certificate Store window, ensure that it says "Trusted Root Certificate Authorities" and click on "Next".
Click on "Finish" and then "OK".
You should see the Securly certificate showing in the certificates folder at this point.

How to manually install the Securly SSL certificate on Windows