Thanks for a generous and prompt response once again.
Often earlier software favourites have lost support in favour of new issues. In many tech sites Spybot, Avast, Lavasoft, Zone Alarm have slipped in ratings. Since it gets a big vote from CDF I've downloaded Zone Alarm but it only offers 2 weeks free trial and I wanted a permanent freeby.
Have Avast / Spybot on drive but they are slow doing deep scan and often leave a few problems. On past CDF advice I run, Malware Anti Malware, CCleaner, Hitman Pro, Advanced System Clean and Firefox foxyproxy.
Pick up problems mainly from Africa (mail n research in African journal archives n camourflaged spam). Although retired a few years, my old email address remains listed with world trade orgs and I can't seem to get it removed so I get a lot of unsolicited mail/spam.
Yo'all advise a router with firewall. Perhaps I should go for extras - PAT,SPI,VPN. Any recommendations / advice please ?
P4 3ghz 512mb 70 gb hd computers + small lap top, all 5.y.o. Cable.