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I use an early 2011 MacBook Pro 15". It has partitions for Mac OS 10.13.6, Windows 10 and Ubuntu 18.04. Recently, when I tried to update Mac OS, the update failed with a message warning that the update would make the Boot Camp partition unbootable. After a while, the update went ahead anyway and yes, it has made the Boot Camp partition unbootable. I have tried following instructions online to fix the partition using GDisk but so far I can't get Windows to boot. I have my partition scheme below, does anyone have any tips to get Windows booting again?

    $ diskutil list
/dev/disk0 (internal, physical):
 #:                       TYPE NAME                    SIZE        IDENTIFIER
0:      GUID_partition_scheme                        *750.2 GB   disk0
1:                        EFI EFI                     209.7 MB   disk0s1
2:                  Apple_HFS MacOS                   349.3 GB   disk0s2
3:                  Apple_HFS Recovery HD             650.0 MB   disk0s3
4:       Microsoft Basic Data                         219.6 GB   disk0s4
5:        Bios Boot Partition                         1.0 MB     disk0s5
6:           Linux Filesystem                         176.2 GB   disk0s6
7:                 Linux Swap                         4.2 GB     disk0s7

Here is the partition list from GDisk:

Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB
Sector size (logical): 512 bytes
Disk identifier (GUID): D919A0CB-4F31-429A-89FF-A7B377C998C2
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 1465149134
Partitions will be aligned on 8-sector boundaries
Total free space is 1749 sectors (874.5 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              40          409639   200.0 MiB   EF00  EFI System Partition
   2          409640       682629607   325.3 GiB   AF00  MacOS
   3       682629608       683899143   619.9 MiB   AF00  
   4       683899144      1112788991   204.5 GiB   0700  Microsoft basic data
   5      1112788992      1112791039   1024.0 KiB  EF02  
   6      1112791040      1456945151   164.1 GiB   8300  
   7      1456945152      1465147391   3.9 GiB     8200 

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