i have same folder and really scare me, but now i know what that thing for , for those friends who say that the folder i empty ,yes it look empty but it take space ! this folder if you check it's property (by right click) you will notice it's hidden and write only folder .
i delete it for several times but it generate it self immediately and that why it was scaring me .
but if it's some staff for WMC ,then it' OK and i will forget about it ...