Windows 7 64 bit OS, Intel i7 2.4 GHz processor, 16 GB ram, I have been playing Tekkit single player and multiplayer, I updated to 64 bit Java because I read it might help me with the 'out of memory' error I've been getting, now tekkit won't start at all. I get a brief flash of a cmd window then nothing. Please tell me what else I can tell you to help you help me. Thanks!
edit: antivirus: Microsoft Security Essentials