It is mostly caused due to corrupt language packs. Can you uninstall all language packs, reboot the PC, and then try to install the service pack again?
My Computer
At a glance
Windows® 8 Pro (64-bit)Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB...6GB DDR3 System Memory at 1,333MHz (on BD 4GB...AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic)