F18 fails to install on Toshiba Satellite M860

Sun Apr 14 23:49:02 UTC 2013

Hi,

I tried but failed to install F18 from Live CD F18 X64  on Toshiba
Satellite M860, Processor Core i7, Ram 4G. It is a 64-bit  machine  and
brand new with pre-installed Windows 8. I want to have dual-boot system.
The message is the following:

 [     0.939290] Couldn't get size: 0x800000000000000e
 [     0.939460] EFI: Problem loading in-kernel X.509 certificate (-129)
 [     0.939494] EFI: Problem loading in-kernel X.509 certificate (-129)

Similar Live CD F18 is bootable on an old machine Toshiba U505, Core i3,
RAM 2G without any problem. Could anyone please give some suggestion for
solution or any related link?  Thanks in advence.
regards,
AA Musharih
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