This problem appears to be related to Norton AntiVirus 2002 and Sound Control’s Automatically Display Song Title When It Changes option. It has been reported that users of Norton AntiVirus 2001 can run LiveUpdate to download an update so this CPU usage problem does not occur. It is unclear at this stage whether the program causing this problem is NAV2002 or Sound Control. Whilst investigating this problem users of NAV2002 can continue to use Sound Control but the Automatically Display Song Title option must be unchecked / off. This problem also affected NAV2003. It however appears a LiveUpdate in NAV2003 and/or using Winamp v5 seems to solve this problem and the Automatically Display Song Title can be used if required.