Step 1:
If your document was signed from 6 Jan, 2018: Download the Secured Signing Root Certificate.
If your document was signed up to 6 Jan, 2018: Download the Secured Signing Root Certificate.
Step 2:
Double click on the Root Certificate from your download location and click Install Certificate.
Step 3:
In the wizard that pops up, click Next.
Step 4:
In the next window click Next.
Step 5:
In the next window click Finish.
Step 6:
Choose Yes in the Security Warning window.
Step 7:
Click Ok to complete the installation.
