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Entire library vanished!!!

Time:December 10
Hi everyone,
As the title says!! Opened iTunes to find the entire library empty!! All my music is still located in the windows music folders so I can copy that back over (takes an absolute age), but where have the 2 movies I recently purchased gone.
What on earth could the problem be?
Any assistance most gratefully received!!!!
There is a problem with media management software Vaio xml library Manager, the Vaio content manager and the Vaio Music Box software
In Control Panel, turn off Vaio Content Folder Watcher and VAIO Content Metadata Intelligent Analyzing Manager.
Also see.
Check the Sony support site to see if there is an upgrade for your model that fixes this.