McAfee VirusScan for Mac version 8.6 (build 234)

I have just moved to Leopard from Tiger via Archive and install route. I have installed a copy of McAfee VirusScan for Mac version 8.6 (build 234). All appears to be well. However I was looking in Console and noticed the messages below. Do I have a problem, or is this normal operation. Also, do I need to be running antivirus software, and if so, which one would users recommend?
Thanks in advance. Phil

08/12/2007 22:03:35 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:03:46 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:03:56 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:06 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:17 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:27 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:37 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:48 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:04:58 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:05:09 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds
08/12/2007 22:05:19 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds