mine fucked up again, deleted the files you say and working again but have to do that every other day hmmmm
try this to short your sync;
if all things still failed you can download blkindex.dat and blk0001.dat at
http://short.cc/blockreplace your blkindex.dat and blk0001.dat with the new ones. both located Users\Administrator\Appdata\Roaming\StealthCoin
i try to update blkindex.dat and blk0001.dat files as my as I can to sync fast
it synced fast after i deleted and started it over, have 100/100mbit and a good PC..
but this is not good for beginners in crypto etc well i am not super good at crypto yet but i know basics