If you receive a message that "Your connection is not private", then you have an old Archinet SSL certificate cached on your computer that needs to be updated. To resolve this issue, you will need to "Clear SSL State" by following the below instructions:
Open the Start menu.
Search for and open Internet Options.
In the dialog box that appears, select the Content tab.
Click Clear SSL State.
Click "Apply"
Click "OK"
After performing the above steps, you should be able to access the Archinet.net websites again without issue.