Well....did you do the suggested number 2 item with my previous post?
Check the epo logs and see what you are missing or what you did wrong. Look for this epoapsvr.log, and at the bottom you'll see the last event (i suggest you open the logs after you have performed another "deploy Virus Scan" so the logs will be updated once you opened it)
You can post your log here so everybody here can help you. Also, i bet the "missing" part here is the Administrator account to the PC that you are deploying to.
Before deployment ensure the ff:
1) Administrator account in the PC (if the PC is in a domain use the domain admin account)
- i suggest not to use the default built in Administrator account, create another one just for you. and for future troubleshooting requirements
2) Ensure that your ePO server can PING the computer using its HOSTNAME and not just the IP Address, if not then edit your host file