Been trying a few things, and found out a few things.
My window 7 still boots and works, but burning a dvd fails like it failed with Leap too. ( either dvd burner is dead on arrival, or I just need new dvd , better dvd disks )
Its not a problem related to this topic, and I already made an 42.3 install usb.
After again trying to change setting in yast, I went two steps backward and one step forward.
I do not longer get greeted by grub, windows 7 boots 
When I however use my mobo boot option menu, and boot the 42.3 disk, next thing that pops up is grub, asking me if I want to boot 42.3 ( as first option, that’s the step forward) or win 7, or leap 42.1.
Something is messed up.
Question, how hard is it to clean out the mbr of windows7 ? , worse case scenario through win 7 ? ( with windows dvd ? cd ? inserted start something and type fix mbr from the top of my head)
Can I see and read, edit the windows mbr ? with Leap ? I tried google , but cant find a clear answer.
I am not an expert , but I can imagine the windows mbr file to have allot of Linux made entries.
from 11.3 install to 42.3 install, that could cause issues ?
Grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if -f ${config_directory}/grubenv ]; then
load_env -f ${config_directory}/grubenv
elif -s $prefix/grubenv ]; then
load_env
fi
if "${env_block}" ] ; then
load_env -f "${env_block}"
fi
if "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
if "${env_block}" ] ; then
save_env -f "${env_block}" next_entry
fi
set boot_once=true
else
set default="${saved_entry}"
fi
if x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
if "${env_block}" ] ; then
save_env -f "${env_block}" saved_entry
fi
fi
}
function load_video {
if x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 --hint='hd0,msdos2' c4f60c97-194b-4ffc-83a3-4f7af2b9d608
else
search --no-floppy --fs-uuid --set=root c4f60c97-194b-4ffc-83a3-4f7af2b9d608
fi
font="/usr/share/grub2/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 --hint='hd0,msdos2' c4f60c97-194b-4ffc-83a3-4f7af2b9d608
else
search --no-floppy --fs-uuid --set=root c4f60c97-194b-4ffc-83a3-4f7af2b9d608
fi
insmod gfxmenu
loadfont ($root)/boot/grub2/themes/openSUSE/ascii.pf2
loadfont ($root)/boot/grub2/themes/openSUSE/DejaVuSans10.pf2
loadfont ($root)/boot/grub2/themes/openSUSE/DejaVuSans12.pf2
loadfont ($root)/boot/grub2/themes/openSUSE/DejaVuSans-Bold14.pf2
insmod png
set theme=($root)/boot/grub2/themes/openSUSE/theme.txt
export theme
if x${boot_once} = xtrue ]; then
set timeout=0
elif x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=8
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=8
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/00_tuned ###
set tuned_params=""
### END /etc/grub.d/00_tuned ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'openSUSE Leap 42.3' --class opensuse --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-c4f60c97-194b-4ffc-83a3-4f7af2b9d608' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 --hint='hd0,msdos2' c4f60c97-194b-4ffc-83a3-4f7af2b9d608
else
search --no-floppy --fs-uuid --set=root c4f60c97-194b-4ffc-83a3-4f7af2b9d608
fi
echo 'Loading Linux 4.4.114-42-default ...'
linux /boot/vmlinuz-4.4.114-42-default root=UUID=c4f60c97-194b-4ffc-83a3-4f7af2b9d608 resume=/dev/sdb2splash=silent quiet showopts
echo 'Loading initial ramdisk ...'
initrd /boot/initrd-4.4.114-42-default
}
submenu 'Advanced options for openSUSE Leap 42.3' --hotkey=1 $menuentry_id_option 'gnulinux-advanced-c4f60c97-194b-4ffc-83a3-4f7af2b9d608' {
menuentry 'openSUSE Leap 42.3, with Linux 4.4.114-42-default' --hotkey=2 --class opensuse --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.114-42-default-advanced-c4f60c97-194b-4ffc-83a3-4f7af2b9d608' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 --hint='hd0,msdos2' c4f60c97-194b-4ffc-83a3-4f7af2b9d608
else
search --no-floppy --fs-uuid --set=root c4f60c97-194b-4ffc-83a3-4f7af2b9d608
fi
echo 'Loading Linux 4.4.114-42-default ...'
linux /boot/vmlinuz-4.4.114-42-default root=UUID=c4f60c97-194b-4ffc-83a3-4f7af2b9d608 resume=/dev/sdb2splash=silent quiet showopts
echo 'Loading initial ramdisk ...'
initrd /boot/initrd-4.4.114-42-default
}
menuentry 'openSUSE Leap 42.3, with Linux 4.4.104-18.44-default' --class opensuse --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.104-18.44-default-advanced-c4f60c97-194b-4ffc-83a3-4f7af2b9d608' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 --hint='hd0,msdos2' c4f60c97-194b-4ffc-83a3-4f7af2b9d608
else
search --no-floppy --fs-uuid --set=root c4f60c97-194b-4ffc-83a3-4f7af2b9d608
fi
echo 'Loading Linux 4.4.104-18.44-default ...'
linux /boot/vmlinuz-4.4.104-18.44-default root=UUID=c4f60c97-194b-4ffc-83a3-4f7af2b9d608 resume=/dev/sdb2splash=silent quiet showopts
echo 'Loading initial ramdisk ...'
initrd /boot/initrd-4.4.104-18.44-default
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-807E884F7E883FC0' {
insmod part_msdos
insmod ntfs
set root='hd0,msdos1'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 807E884F7E883FC0
else
search --no-floppy --fs-uuid --set=root 807E884F7E883FC0
fi
parttool ${root} hidden-
chainloader +1
}
menuentry 'openSUSE 42.1 (x86_64) (on /dev/sdc2)' --class suse --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-d7f4b56d-4dd4-436c-853e-1df028aea008' {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 d7f4b56d-4dd4-436c-853e-1df028aea008
else
search --no-floppy --fs-uuid --set=root d7f4b56d-4dd4-436c-853e-1df028aea008
fi
linux /boot/vmlinuz-4.1.39-56-default root=UUID=d7f4b56d-4dd4-436c-853e-1df028aea008 resume=/dev/disk/by-uuid/898bf52e-faf9-4a5a-90ea-1cea63c290cc splash=silent quiet showopts
initrd /boot/initrd-4.1.39-56-default
}
submenu 'Advanced options for openSUSE 42.1 (x86_64) (on /dev/sdc2)' $menuentry_id_option 'osprober-gnulinux-advanced-d7f4b56d-4dd4-436c-853e-1df028aea008' {
menuentry 'openSUSE Leap 42.1 (on /dev/sdc2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-4.1.39-56-default--d7f4b56d-4dd4-436c-853e-1df028aea008' {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 d7f4b56d-4dd4-436c-853e-1df028aea008
else
search --no-floppy --fs-uuid --set=root d7f4b56d-4dd4-436c-853e-1df028aea008
fi
linux /boot/vmlinuz-4.1.39-56-default root=UUID=d7f4b56d-4dd4-436c-853e-1df028aea008 resume=/dev/disk/by-uuid/898bf52e-faf9-4a5a-90ea-1cea63c290cc splash=silent quiet showopts
initrd /boot/initrd-4.1.39-56-default
}
menuentry 'openSUSE Leap 42.1, met Linux 4.1.39-56-default (on /dev/sdc2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-4.1.39-56-default--d7f4b56d-4dd4-436c-853e-1df028aea008' {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 d7f4b56d-4dd4-436c-853e-1df028aea008
else
search --no-floppy --fs-uuid --set=root d7f4b56d-4dd4-436c-853e-1df028aea008
fi
linux /boot/vmlinuz-4.1.39-56-default root=UUID=d7f4b56d-4dd4-436c-853e-1df028aea008 resume=/dev/disk/by-uuid/898bf52e-faf9-4a5a-90ea-1cea63c290cc splash=silent quiet showopts
initrd /boot/initrd-4.1.39-56-default
}
menuentry 'openSUSE Leap 42.1, met Linux 4.1.15-8-default (on /dev/sdc2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-4.1.15-8-default--d7f4b56d-4dd4-436c-853e-1df028aea008' {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 d7f4b56d-4dd4-436c-853e-1df028aea008
else
search --no-floppy --fs-uuid --set=root d7f4b56d-4dd4-436c-853e-1df028aea008
fi
linux /boot/vmlinuz-4.1.15-8-default root=UUID=d7f4b56d-4dd4-436c-853e-1df028aea008 resume=/dev/disk/by-uuid/898bf52e-faf9-4a5a-90ea-1cea63c290cc splash=silent quiet showopts
initrd /boot/initrd-4.1.15-8-default
}
}
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
### BEGIN /etc/grub.d/80_suse_btrfs_snapshot ###
### END /etc/grub.d/80_suse_btrfs_snapshot ###
### BEGIN /etc/grub.d/90_persistent ###
### END /etc/grub.d/90_persistent ###
### BEGIN /etc/grub.d/95_textmode ###
### END /etc/grub.d/95_textmode ###