GRUB Bootloader not recognizing windows 8, dualbooting with Kali

I installed Kali on my Acer aspire V5 on a separate partition from windows 8. When I installed Kali linux, I installed Gnome at the beginning of the partition of my Kali installation. Once I installed Kali linux, for some reason the BIOS couldn't boot from my Kali partition, and when I tried to create a new entry for the windows bootloader with Kali and did lots of things but none of them let me boot Kali linux. I ended up removing the Windows bootloader entry by accident and it actually made it work, the Laptop now boots from GRUB.

My problem is that the GRUB doesn't recognize Windows 8 for some reason, and now I can't boot into Windows 8. The partition is fine, and it seems to have all of its original system files, but I just can't boot into it. I've tried to update grub by running the update-grub command but that didn't work, and I couldn't find any other solutions. I also tried to boot from the recovery partition (By holding down alt and F8 on my computer) and it went straight to the GRUB bootloader for some reason, I don't know why.

I ran the boot-info script and the results are here:

Code:

---

                  Boot Info Script 0.61      [1 April 2012]


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

 => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector
    727457792 of the same hard drive for core.img. core.img is at this
    location and looks for (,gpt7)/boot/grub on this drive.

sda1: __________________________________________________________________________

    File system:      ntfs
    Boot sector type:  Windows Vista/7: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System: 
    Boot files:       

sda2: __________________________________________________________________________

    File system:      vfat
    Boot sector type:  Unknown
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System: 
    Boot files:       

sda3: __________________________________________________________________________

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

sda4: __________________________________________________________________________

    File system:      ntfs
    Boot sector type:  Windows Vista/7: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System: 
    Boot files:        /Windows/System32/winload.exe

sda5: __________________________________________________________________________

    File system:      BIOS Boot partition
    Boot sector type:  Grub2's core.img
    Boot sector info:

sda6: __________________________________________________________________________

    File system:      ntfs
    Boot sector type:  Windows Vista/7: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System: 
    Boot files:       

sda7: __________________________________________________________________________

    File system:      ext4
    Boot sector type:  -
    Boot sector info:
    Mounting failed:  mount: unknown filesystem type ''
mount: /dev/sda7 already mounted or sda7 busy

sda8: __________________________________________________________________________

    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      821,247      819,200 Windows Recovery Environment (Windows)
/dev/sda2        821,248    1,435,647      614,400 EFI System partition
/dev/sda3      1,435,648    1,697,791      262,144 Microsoft Reserved Partition (Windows)
/dev/sda4      1,697,792  727,457,791  725,760,000 Data partition (Windows/Linux)
/dev/sda5    727,457,792  727,459,839        2,048 BIOS Boot partition
/dev/sda6    943,720,448  976,773,119    33,052,672 Windows Recovery Environment (Windows)
/dev/sda7    727,459,840  934,871,039  207,411,200 Data partition (Windows/Linux)
/dev/sda8    934,871,040  943,720,447    8,849,408 Swap partition (Linux)

"blkid" output: ________________________________________________________________

Device          UUID                                  TYPE      LABEL

/dev/sda1        2E24AF3324AEFD49                      ntfs      Recovery
/dev/sda2        E6B1-5517                              vfat      ESP
/dev/sda4        0298DD6C98DD5EAB                      ntfs      Acer
/dev/sda6        5C4EB41A4EB3EAC2                      ntfs      Push Button Reset
/dev/sda7        4dc0bda4-e9f5-405d-a77a-0b18db9a7bdc  ext4     
/dev/sda8        ece97563-0526-4e3d-bc46-948921fb1ed3  swap     

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

Device          Mount_Point              Type      Options

/dev/disk/by-uuid/4dc0bda4-e9f5-405d-a77a-0b18db9a7bdc /                        ext4      (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda4        /media/Acer              fuseblk    (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)
/dev/sda6        /media/Push Button Reset fuseblk    (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)


======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda2

00000000  eb 58 90 4d 53 44 4f 53  35 2e 30 00 02 08 5e 1b  |.X.MSDOS5.0...^.|
00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 88 0c 00  |........?.......|
00000020  00 60 09 00 51 02 00 00  00 00 00 00 02 00 00 00  |.`..Q...........|
00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  80 00 29 17 55 b1 e6 4e  4f 20 4e 41 4d 45 20 20  |..).U..NO NAME  |
00000050  20 20 46 41 54 33 32 20  20 20 33 c9 8e d1 bc f4  |  FAT32  3.....|
00000060  7b 8e c1 8e d9 bd 00 7c  88 56 40 88 4e 02 8a 56  |{......|[email protected]|
00000070  40 b4 41 bb aa 55 cd 13  72 10 81 fb 55 aa 75 0a  |@.A..U..r...U.u.|
00000080  f6 c1 01 74 05 fe 46 02  eb 2d 8a 56 40 b4 08 cd  |...t..F..-.V@...|
00000090  13 73 05 b9 ff ff 8a f1  66 0f b6 c6 40 66 0f b6  |.s......f...@f..|
000000a0  d1 80 e2 3f f7 e2 86 cd  c0 ed 06 41 66 0f b7 c9  |...?.......Af...|
000000b0  66 f7 e1 66 89 46 f8 83  7e 16 00 75 39 83 7e 2a  |f..f.F..~..u9.~*|
000000c0  00 77 33 66 8b 46 1c 66  83 c0 0c bb 00 80 b9 01  |.w3f.F.f........|
000000d0  00 e8 2c 00 e9 a8 03 a1  f8 7d 80 c4 7c 8b f0 ac  |..,......}..|...|
000000e0  84 c0 74 17 3c ff 74 09  b4 0e bb 07 00 cd 10 eb  |..t.<.t.........|
000000f0  ee a1 fa 7d eb e4 a1 7d  80 eb df 98 cd 16 cd 19  |...}...}........|
00000100  66 60 80 7e 02 00 0f 84  20 00 66 6a 00 66 50 06  |f`.~.... .fj.fP.|
00000110  53 66 68 10 00 01 00 b4  42 8a 56 40 8b f4 cd 13  |Sfh.....B.V@....|
00000120  66 58 66 58 66 58 66 58  eb 33 66 3b 46 f8 72 03  |fXfXfXfX.3f;F.r.|
00000130  f9 eb 2a 66 33 d2 66 0f  b7 4e 18 66 f7 f1 fe c2  |..*f3.f..N.f....|
00000140  8a ca 66 8b d0 66 c1 ea  10 f7 76 1a 86 d6 8a 56  |..f..f....v....V|
00000150  40 8a e8 c0 e4 06 0a cc  b8 01 02 cd 13 66 61 0f  |@............fa.|
00000160  82 74 ff 81 c3 00 02 66  40 49 75 94 c3 42 4f 4f  |[email protected]|
00000170  54 4d 47 52 20 20 20 20  00 00 00 00 00 00 00 00  |TMGR    ........|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 0d 0a 44 69  |..............Di|
000001b0  73 6b 20 65 72 72 6f 72  ff 0d 0a 50 72 65 73 73  |sk error...Press|
000001c0  20 61 6e 79 20 6b 65 79  20 74 6f 20 72 65 73 74  | any key to rest|
000001d0  61 72 74 0d 0a 00 00 00  00 00 00 00 00 00 00 00  |art.............|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 00 00  ac 01 b9 01 00 00 55 aa  |..............U.|
00000200


=============================== StdErr Messages: ===============================

xz: (stdin): Compressed data is corrupt
  No volume groups found

---

My Kali version is 3.4.2 with amd64 architecture, and its KDE. I've installed Kali on my Acer Aspire V5 notebook. I have secureboot and fastboot disabled and I am still running BIOS on UEFI mode.

Thank you very much for any help you can give me.

HI,
well from months myself looking around but couldn't solve my problem.my question is about penetration testing KALI LINUX its a normal linux like normal my point of view i just wanted to install kali linux into my external USB HDD so that i need i can boot from my external USB HDD ok remember i am not taking about live boot.i am OK with that.i just wanted to complete install like windows.the problem comes when i make live USB PEN_DRIVE to install into my EXTERNAL USB HDD everything goes perfect with successfully but when i restart my laptop n boot from my USB HDD FROM BIOS its gives me a GRUB RESCUE even i had try to repair my grub but fail than i had remove my laptop internal HARD DRIVE than make a try with USB HDD live Kali Linux to select into my external USB HDD same everything goes perfect with last final grub installation than i reinstall my main INTERNAL HDD into my laptop and connect my EXTERNAL USB HDD n from bios boot from USB HDD
same problem GRUB RESCUE even i cant repair with same live kali linux so kindly help me out how to fix this problem i don't want to do DUAL boot just complete different .DO REPLY...