A security threat Win32/Bagle.AY has infected my Compaq Presario 610FD VH452PA laptop since the last ten days. All my efforts to delete this security threats are failing. I am not able to browse internet at the same speed. I keep on receiving spam mails very regularly that also in huge numbers. Also there are a lot of pop-up messages that get displayed even after turning the Pop-up blocker on. Please also help me with some secure anti-virus program.