Windows 7 / Adobe / fat hidden places

c:\Users\User\AppData\Roaming\Adobe\Common\Media Cache Files\
c:\Users\User\AppData\Local\Adobe\Lightroom\Caches\Video\Media Cache Files\

^ After nuking this two there is now misterius 80 new gigs free on c:\ drive. FYA. p.s. Can’t see any reasons why lightroom cache dir is used for video cache.