I have 15 Block Erupters on 3 hubs in Windows 8.  CGminer crashes if I add more than 13 to my .bat file.  It doesn't matter which 13 I run, they work.  However whenever I go over 13, I get an error that says "cgminer-nogpu.exe has stopped working"

I'd appreciate any ideas about how to get them all working. :-)