In doing more research, I am finding an error that might be cuasing the 
grub2-mkconfig to not work.

Manually putting the lines in the grub.cfg file, I can boot to the windows 10 
with no problem. 

Just tried to mount the windows partition from the fedora 25, and get the 
following error??
/sbin/mount.ntfs: symbol lookup error: /sbin/mount.ntfs: undefined symbol: 
ntfs_xattr_build_mapping

Did a dnf reinstall of ntfs-3g, and got the same error. 

Just downloaded the ntfs-3g_ntfsprogs-2016.2.22.tgz which seems to be the 
same version, did a configure, make and then make install. Was then able to 
mount the partitions, and just now ran the grub2-mkconfig and it worked. 

So, not sure what was causign the symbol lookup error?? 


On 3 Dec 2016 at 11:59, Michael D. Setzer II wrote:

From:                   "Michael D. Setzer II" <mi...@kuentos.guam.net>
To:                     jd1008 <jd1...@gmail.com>,
                Community support for Fedora users 
<users@lists.fedoraproject.org>
Date sent:              Sat, 03 Dec 2016 11:59:15 +1000
Subject:                Re: Windows missing from grub.cfg after updating to 
Fedora 25?
Priority:               normal
Send reply to:          Community support for Fedora users 
<users@lists.fedoraproject.org>

> On 2 Dec 2016 at 18:54, jd1008 wrote:
> 
> Subject:              Re: Windows missing from grub.cfg after updating to 
> Fedora 25?
> To:                   Community support for Fedora users 
> <users@lists.fedoraproject.org>
> From:                 jd1008 <jd1...@gmail.com>
> Date sent:            Fri, 2 Dec 2016 18:54:05 -0700
> Send reply to:        Community support for Fedora users 
> <users@lists.fedoraproject.org>
> 
> > 
> > 
> > On 12/02/2016 06:34 PM, Michael D. Setzer II wrote:
> > > I just recently updated a system from Fedora 24 to Fedora 25, and
> > > everything seemed to go just fine. Just noticed that windows is no longer 
> > > on
> > > the grub boot menu? Reran grub2-mkconfig -o /boot/grub2/grub.cfg and still
> > > nothing. entries for 30-osprober show nothing. Running os-prober also 
> > > shows
> > > nothing.
> > >
> > > Just copied the lines from one of the other 19 machines still running 
> > > Fedora
> > > 24 in place of the missing data, and it seems to work just fine?
> > >
> > > ### BEGIN /etc/grub.d/30_os-prober ###
> > > menuentry 'Windows 10 (loader) (on /dev/sda2)' --class windows --class os
> > > $menuentry_id_option 'osprober-chain-689A3A3E9A3A08D8' {
> > >   insmod part_msdos
> > >   insmod ntfs
> > >   set root='hd0,msdos2'
> > >   if [ x$feature_platform_search_hint = xy ]; then
> > >     search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2
> > > --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'
> > > 689A3A3E9A3A08D8
> > >   else
> > >     search --no-floppy --fs-uuid --set=root 689A3A3E9A3A08D8
> > >   fi
> > >   parttool ${root} hidden-
> > >   drivemap -s (hd0) ${root}
> > >   chainloader +1
> > > }
> > > ### END /etc/grub.d/30_os-prober ###
> > >
> > > So, not clear what has caused the grub2-mkconfig to no longer see the
> > > Windows 10???
> > >
> > > Thanks.
> > >
> > So just copy the segment you quoted from your previous grub.cfg into the 
> > new one
> > and reboot.
> 
> That is exactly what I did, and it works, but if I run grub2-mkconfig again, 
> or 
> the system updates the kernels, it is going to be gone again. So, that would 
> fix the problem for me, since I have 19 other systems in the classroom, but 
> if 
> this was the only machine would have to figure out the lines.
> 
> > _______________________________________________
> > users mailing list -- users@lists.fedoraproject.org
> > To unsubscribe send an email to users-le...@lists.fedoraproject.org
> 
> 
> +----------------------------------------------------------+
>   Michael D. Setzer II -  Computer Science Instructor      
>   Guam Community College  Computer Center                  
>   mailto:mi...@kuentos.guam.net                            
>   mailto:msetze...@gmail.com
>   Guam - Where America's Day Begins                        
>   G4L Disk Imaging Project maintainer 
>   http://sourceforge.net/projects/g4l/
> +----------------------------------------------------------+
> 
> http://setiathome.berkeley.edu (Original)
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+----------------------------------------------------------+
  Michael D. Setzer II -  Computer Science Instructor      
  Guam Community College  Computer Center                  
  mailto:mi...@kuentos.guam.net                            
  mailto:msetze...@gmail.com
  Guam - Where America's Day Begins                        
  G4L Disk Imaging Project maintainer 
  http://sourceforge.net/projects/g4l/
+----------------------------------------------------------+

http://setiathome.berkeley.edu (Original)
Number of Seti Units Returned:  19,471
Processing time:  32 years, 290 days, 12 hours, 58 minutes
(Total Hours: 287,489)

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