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nav.exe has high cpu
For the last few weeks nav.exe has been going to ~75% CPU. It usually happens after playing a flash based game or overnight (maybe during the system idle scanning). The high CPU prevents sleep mode from occurring. Another effect is that when the CPU is high and I start Thunderbird, any email I send will get a RSET. Even after closing Thunderbird, Norton will continue sending resets to the SMTP server (I can see this happening in Wireshark). When this is happening, shutting off all the features for Norton has no effect. The only fix is to reboot. It will then be fine until nav.exe decides to freak out again. High CPU usage for nav.exe (as shown in task manager) and all the associated problems Norton AV is causing are the only problem I can find. No browser redirects, no apparent traffic being send elsewhere. No popups or any other odd behavior. According to Process Explorer there are three threads in nav.exe at ~25% each that are the problem. I currently have Windows 7 and Norton Antivirus 18.104.22.168 (the update function thinks that is the latest). Norton's help and forums comment a lot about high CPU alerts etc, but nothing much about nav.exe itself being the problem. As my renewal is due, this is urgent, please advise as soon as possible.