Installed on Windows 7 OS.  LOVE IT BTW!  I often add domains to my blocked domain list.  ALL of a sudden this process has become painfully slow.  I can say my list is quite long as I receive tons of spam.  Might my list be too populated?  This started suddenly.  If I recall, (somewhat feeble mind here) I was poking around and I believe I set some kind of "Windows 7 emulation mode" within Live Mail (or not :-))  Coincidentally, this is when this issue arose.  Any assistance is appreciated!