Zonealarm consistently asks for programs consisting simply of four numbers - 2648, 3448 etc. - to be allowed access to the internet. I refuse on each occasion, with no apparent ill effect, but I am constantly prompted by another set of apparently random numbers, normally just after start-up. I have run full PC-Cillin and Ad-aware scans and there's nothing to indicate I have an unwelcome worm or virus. Are these programs innocent and how can I source them to stop the nuisance?