I moved this provisionally to Service Portal Feedback but if you'd prefer ePO please let me know.
Could be an issue with the Certificate Authority and the date. To verify this change the date on the system you are trying to install virusscan - June 2013.
I bet you .0000001 bitcoin it will work!
hello mjameshall, could you be more detailed in what you are suggesting? where did you get this workaround? self made or got from other sources? in this case please send link ?