grub2 - Dual-boot Ubuntu 13.04 and Windows 8: Windows doesn't boot

I have installed Ubuntu with dual boot to a preinstalled windows 8 on a Lenovo E-135. I disabled fast start in windows 8 before installation and shrank the partition to give place for Ubuntu. All went well and the installer went on very smoothly. After restart Ubuntu booted perfectly.....

And then I tried to restart to boot into windows 8 but no entries suggestion any windows partition. I restarted into Ubuntu and ran Boot repair. All went well and after the next reboot a lot of entries were present suggesting some could be the windows entry.. But nothing allowed Windows 8 to start.

Some options reported that they were forbidden for secure-boot and others reported that a file was missing.

I looked at the Boot repair report but I can not understand what it tells me. So what shall I do to make Windows 8 start also??

Here is the paste file first part

Boot Info Script e7fc706 + Boot-Repair extra info      [Boot-Info 31Jan2013]


============================= Boot Info Summary: ===============================

 => No boot loader is installed in the MBR of /dev/sda.

sda1: __________________________________________________________________________

    File system:       ntfs

    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:        

sda2: __________________________________________________________________________

    File system:       vfat
    Boot sector type:  Windows 8/2012: FAT32
    Boot sector info:  No errors found in the Boot Parameter Block.

    Operating System:  
    Boot files:        /EFI/Boot/bkpbootx64.efi /EFI/Boot/bootx64.efi 
                       /EFI/ubuntu/grubx64.efi /EFI/ubuntu/shimx64.efi 
                       /EFI/Lenovo/Boot/bootmgfw.efi 
                       /EFI/Lenovo/Boot/bootmgr.efi 
                       /EFI/Lenovo/Boot/memtest.efi 
                       /EFI/Microsoft/Boot/bkpbootmgfw.efi 
                       /EFI/Microsoft/Boot/bootmgfw.efi 
                       /EFI/Microsoft/Boot/bootmgr.efi 
                       /EFI/Microsoft/Boot/bootx64.efi 

                       /EFI/Microsoft/Boot/memtest.efi

sda3: __________________________________________________________________________

    File system:       
    Boot sector type:  -
    Boot sector info: 
    Mounting failed:   mount: unknown filesystem type ''

sda4: __________________________________________________________________________


    File system:       ntfs
    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  Windows 8
    Boot files:        /bootmgr /Boot/BCD /Windows/System32/winload.exe

sda5: __________________________________________________________________________

    File system:       ntfs

    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:        

sda6: __________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info: 

    Operating System:  Ubuntu 13.04 
    Boot files:        /boot/grub/grub.cfg /etc/fstab

sda7: __________________________________________________________________________

    File system:       swap
    Boot sector type:  -
    Boot sector info: 

============================ Drive/Partition Info: =============================


Drive: sda _____________________________________________________________________

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System


/dev/sda1                   1   976,773,167   976,773,167  ee GPT


GUID Partition Table detected.

Partition    Start Sector    End Sector  # of Sectors System
/dev/sda1           2,048     2,050,047     2,048,000 Windows Recovery Environment (Windows)
/dev/sda2       2,050,048     2,582,527       532,480 EFI System partition
/dev/sda3       2,582,528     2,844,671       262,144 Microsoft Reserved Partition (Windows)
/dev/sda4       2,844,672   475,482,111   472,637,440 Data partition (Windows/Linux)

/dev/sda5     944,373,760   976,773,119    32,399,360 Windows Recovery Environment (Windows)
/dev/sda6     475,482,112   936,921,087   461,438,976 Data partition (Windows/Linux)
/dev/sda7     936,921,088   944,373,759     7,452,672 Swap partition (Linux)

"blkid" output: ________________________________________________________________

Device           UUID                                   TYPE       LABEL

/dev/sda1        66D6ECC9D6EC9A97                       ntfs       WINRE_DRV
/dev/sda2        6AF0-0738                              vfat       SYSTEM_DRV

/dev/sda4        C436F52136F51560                       ntfs       Windows8_OS
/dev/sda5        F238E5D638E599BD                       ntfs       Lenovo_Recovery
/dev/sda6        7686bd41-5732-4917-9853-604e7ef61127   ext4       
/dev/sda7        2d8b17e7-d16c-4361-98bb-7445edccf581   swap       

================================ Mount points: =================================

Device           Mount_Point              Type       Options

/dev/sda6        /                        ext4       (rw,errors=remount-ro)