Sorry for this bother. May be about to demonstrate total lack of understanding of computer! Am running NIS and NPF. HAve been good up to now. Currently I am getting relentless Program Control pop-ups warning about inbound UDP ("Medium Risk") from 18.104.22.168:xxxxx. Am clicking "block always" option only to have literally evry minute a new pop-up box from the same address with different xxxxx. I have done IpLookup and ? this is a site In China. What is this and how to stop these relentless nuisances? XPSP2 up to date Browser is FF Have scanned with AVG, NAV, AdAware, Spysweeper, A2, Ewido: nothing. Have cleaned all trash files and rebooted. Any suggestions. Thanks.