http://www.theregister.com/2007/05/15/vistas_long_goodbye_continues/

Seven weeks ago, when we first reported Vista was causing many machines to stall indefinitely while deleting, copying and moving files, we were sure the problem was caused by a bug that would be fixed relatively quickly. After all, Vista is Microsoft’s flagship product. It’s also an operating system. And everyone knows deleting, copying and moving files are among the most basic tasks any operating system can set out to do.