Download the certificates.p7b (http://<yourWATSserver>/wats-dc/certificates.p7b) to a known location and follow the steps below to manually install certificates.
Open certificates.p7b (double click)
Open the VIC-Root certificate (double click).
Click Install Certificate.
Select Place all certificates in the following store, and click the Browse button.
Check Show physical stores, and select Local Computer under Trusted Root Certification Authorities.
Click OK -> Next -> Finished
Do the same procedure for VirincoCA, but select Local Computer under Intermediate Certification Authorities.