There is a problem with media management software Vaio xml library Manager, the Vaio content manager and the Vaio Music Box software
http://discussions.apple.com/message.jspa?messageID=8537277#8537277
In Control Panel, turn off Vaio Content Folder Watcher and VAIO Content Metadata Intelligent Analyzing Manager.
Also see
http://support.apple.com/kb/ts2715
Sony have issued upgrades to fix this for some models, check you Sony Download site.