Thanks! AFU64 won't run under win8.1 x64? because the terminal window closes immediately after running afu64 command or the batch file included in the SFX. Ran directly from SFX shows up AFU64's options, then exits after a keystroke without flashing or any error messages. EDIT: working, but replace bin file and options in batch. (the proper command is: AFU64 N550JK.bin /p /k). Thanks again. Ready to install w7 x64... SLIC working, OK for ASUS notebook. Which cert is working with it?