Moved from Consumer section to VirusScan Enterprise for attention.
please take a look if a file named (drive):\Documents and Settings\All Users\Application Data\McAfee\Common Framework\Db\Agent_hostname.log (or .XML) exist (path is for Windows XP). This is an indication of your client being managed.
An easy way to make sure of the same would be to enter http://localhost:8081 in a browser, but this access could be locked by central policy therefore looking for the file makes more sense.
Open the .XML file in a browser and it shows you the ePo server name. see if you can ping that server from you computer. There is a default URL for ePO console and you'll need a login id and password with appropriate permissions to change a given product policy.
Normally reading the ePO product guide is recommended to see what and how you are able to do within ePO.