Thank you for answering my post, I have windows vista and have had avg and antivir almost from the start e.i. late December 2008.
It is only since February that I got a Windows Security Alert which said (you have multiple antivirus programes but none of them are turned on) I have tried to turn one or both on with no results including turning of Firewall briefly, I can not delete them and I can no longer download anything.
Other programes that I have are Ad-Aware, Malwarebytes Anti-malware and Spybot.
Once again I would appreciate any help that can be given. J.D.