Today’s attempt, windows is fine both via grub or changing orderin BIOS as I have for the time being,spent some time trying to boot into the “rescue system” I get “Login incorrect” even though both my username and password are just 2 characters each so the chances of me somehow consistently getting it wrong are barely measurable
i tried boot repair tool, I know it’s not tailored to openSUSE, but it was one more tool to try
Which gave this
“Enable repo”
I had some ill-fated attempts to fix this from live-boot
Repo trouble
I’m too new to embed or link more media, but I also got “unable to allocate pty: No such devices” a lot, expecting to be human error, so far my experience with OpenSUSE has been 99% troubleshooting and terminal interactions, the latter being entirely new to me every step of the way, but no harm in mentioning it
I did get a log file, if anyone’s willing to skim through that, apologies in advance if it is in fact something very obvious that’s just going over my head
boot-repair-4ppa2081 [20241111_1130]
============================== Boot Info Summary ===============================
=> No boot loader is installed in the MBR of /dev/nvme0n1.
=> Windows is installed in the MBR of /dev/sda.
=> Windows is installed in the MBR of /dev/sdb.
=> No boot loader is installed in the MBR of /dev/sdc.
=> Grub2 (v2.00) is installed in the MBR of /dev/sdd and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,2)/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
offsetio extcmd macho elf file gettext boot bufio verifiers crypto
terminal normal datetime date mmap drivemap blocklist archelp newc
vga_text relocator video chain ntldr search_label search_fs_file
search_fs_uuid search keylayouts at_keyboard pci usb usb_keyboard gcry_md5
hashsum gcry_crc gzio xzio lzopio lspci fshelp ext2 xfs acpi reboot
iso9660 gcry_sha1 div udf exfat font diskfilter raid6rec zstd btrfs ventoy
read halt video_fb vbe linux linux16 test true sleep echo bitmap gfxterm
bitmap_scale trig video_colors gfxmenu videotest videoinfo functional_test
videotest_checksum video_cirrus video_bochs vga minicmd help configfile tr
biosdisk disk ls tar zfs squash4 pbkdf2 gcry_sha512 password_pbkdf2
all_video png jpeg part_gpt part_msdos fat ntfs loopback
gfxterm_background procfs gfxterm_menu smbios
---------------------------------------------------------------------------
nvme0n1p1: _____________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
nvme0n1p2: _____________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
nvme0n1p3: _____________________________________________________________________
File system: ntfs
Boot sector type: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 10 or 11
Boot files:
nvme0n1p4: _____________________________________________________________________
File system: crypto_LUKS
Boot sector type: Unknown
Boot sector info:
sda1: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sdb1: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sdb2: __________________________________________________________________________
File system: ntfs
Boot sector type: NTFS
Boot sector info: According to the info in the boot sector, sdb2 has
3131074559 sectors, but according to the info from
fdisk, it has 11721009151 sectors.
Operating System:
Boot files:
sdc1: __________________________________________________________________________
File system:
Boot sector type: Unknown
Boot sector info:
sdc2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 7/2008: NTFS
Boot sector info: According to the info in the boot sector, sdc2 has
3518803967 sectors, but according to the info from
fdisk, it has 7813771263 sectors.
Operating System:
Boot files:
sdd1: __________________________________________________________________________
File system: exfat
Boot sector type: -
Boot sector info:
Mounting failed: mount: /mnt/BootInfo/sdd1: /dev/sdd1 already mounted or mount point busy.
sdd2: __________________________________________________________________________
File system: iso9660
Boot sector type: Unknown
Boot sector info:
Operating System:
Boot files:
================================ 2 OS detected =================================
OS#1 (linux): openSUSE Tumbleweed on mapper/system-root
OS#2 (windows): Windows 10 or 11 on nvme0n1p3
================================ Host/Hardware =================================
CPU architecture: 64-bit
Video: Advanced Micro Devices, Inc. [AMD/ATI] Advanced Micro Devices, Inc. [AMD/ATI] EFI VGA from Advanced Micro Devices, Inc. [AMD/ATI] Advanced Micro Devices, Inc. [AMD/ATI]
Live-session OS is Linuxmint 64-bit (Linux Mint 21.2, victoria, x86_64)
===================================== UEFI =====================================
BIOS/UEFI firmware: 1.29.AS01(5.26) from American Megatrends International, LLC.
The firmware is EFI-compatible, and is set in EFI-mode for this live-session.
SecureBoot disabled (confirmed by mokutil).
BootCurrent: 0003
Timeout: 2 seconds
BootOrder: 0002,0000,0003
Boot0000* Windows Boot Manager HD(1,GPT,f38dff69-12b5-4493-b842-7274b23909e5,0x800,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...I................
Boot0002* opensuse HD(1,GPT,f38dff69-12b5-4493-b842-7274b23909e5,0x800,0x32000)/File(\EFI\opensuse\grubx64.efi)
Boot0003* UEFI: USB3.2, Partition 2 PciRoot(0x0)/Pci(0x2,0x1)/Pci(0x0,0x0)/Pci(0xc,0x0)/Pci(0x0,0x0)/USB(2,0)/HD(2,MBR,0x6fb262b0,0xe7c6000,0x10000)..BO
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
nvme0n1 : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, has-win, 2048 sectors * 512 bytes
sdb : is-GPT, no-BIOSboot, has-noESP, not-usb, not-mmc, no-os, no-wind, 34 sectors * 512 bytes
sdc : is-GPT, no-BIOSboot, has-noESP, not-usb, not-mmc, no-os, no-wind, 2048 sectors * 512 bytes
sda : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, no-wind, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
nvme0n1p3 : is-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
nvme0n1p1 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sdb2 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
sdc2 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
sda2 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
mapper/system-root : is-os, 64, zypper --non-interactive, no-docgrub, grub2, grub2-install, no-grubenv, grub2-mkconfig -o /boot/grub, not-far
Partitions info (2/3): _________________________________________________________
nvme0n1p3 : isnotESP, part-has-no-fstab, no-nt, haswinload, no-recov-nor-hid, no-bmgr, notwinboot, ntfs
nvme0n1p1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, vfat
sdb2 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ntfs
sdc2 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ntfs
sda2 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ntfs
mapper/system-root : isnotESP, fstab-has-goodEFI, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, btrfs
Partitions info (3/3): _________________________________________________________
nvme0n1p3 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, nvme0n1
nvme0n1p1 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, nvme0n1
sdb2 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdb
sdc2 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdc
sda2 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda
mapper/system-root : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sda
fdisk -l (filtered): ___________________________________________________________
Disk nvme0n1: 1.86 TiB, 2048408248320 bytes, 4000797360 sectors
Disk identifier: 3E429C67-61B8-45E9-A466-FF4623D5F5F3
Start End Sectors Size Type
nvme0n1p1 2048 206847 204800 100M EFI System
nvme0n1p2 206848 239615 32768 16M Microsoft reserved
nvme0n1p3 239616 716802047 716562432 341.7G Microsoft basic data
nvme0n1p4 716802048 4000797326 3283995279 1.5T Linux LVM
Disk sda: 978.09 GiB, 1050214588416 bytes, 2051200368 sectors
Disk identifier: 0x05e874c3
Boot Start End Sectors Size Id Type
sda1 63 2051198319 2051198257 978.1G 42 SFS
Disk sdb: 5.46 TiB, 6001175126016 bytes, 11721045168 sectors
Disk identifier: 2728D45C-00B4-4774-92E9-8496D25A1968
Start End Sectors Size Type
sdb1 34 32767 32734 16M Microsoft reserved
sdb2 32768 11721041919 11721009152 5.5T Microsoft basic data
Disk sdc: 3.64 TiB, 4000787030016 bytes, 7814037168 sectors
Disk identifier: 1E168934-9DF4-4E0F-9EBB-4701DA53F4EA
Start End Sectors Size Type
sdc1 2082 262177 260096 127M Microsoft reserved
sdc2 264192 7814035455 7813771264 3.6T Microsoft basic data
Disk sdd: 115.92 GiB, 124465971200 bytes, 243097600 sectors
Disk identifier: 0x6fb262b0
Boot Start End Sectors Size Id Type
sdd1 * 2048 243032063 243030016 115.9G 7 HPFS/NTFS/exFAT
sdd2 243032064 243097599 65536 32M ef EFI (FAT-12/16/32)
Disk mapper/ventoy: 2.45 GiB, 2630877184 bytes, 5138432 sectors
Disk identifier: 0x14eb2669
Boot Start End Sectors Size Id Type
mapper/ventoy-part1 * 0 5138431 5138432 2.5G 0 Empty
mapper/ventoy-part2 572 9067 8496 4.1M ef EFI (FAT-12/16/32)
Disk mapper/cryptroot: 1.53 TiB, 1681388805632 bytes, 3283962511 sectors
Disk mapper/system-swap: 30.47 GiB, 32719765504 bytes, 63905792 sectors
Disk mapper/system-root: 1.5 TiB, 1648667656192 bytes, 3220054016 sectors
parted -lm (filtered): _________________________________________________________
sda:1050GB:scsi:512:512:msdos:ATA Crucial_CT1050MX:;
1:32.3kB:1050GB:1050GB:::;
sdb:6001GB:scsi:512:4096:gpt:ATA WDC WD60EZAZ-00S:;
1:17.4kB:16.8MB:16.8MB::Microsoft reserved partition:msftres;
2:16.8MB:6001GB:6001GB:ntfs:Basic data partition:msftdata;
sdc:4001GB:scsi:512:4096:gpt:ATA WDC WD40EZRX-00S:;
1:1066kB:134MB:133MB:::msftres;
2:135MB:4001GB:4001GB:ntfs::msftdata;
sdd:124GB:scsi:512:512:msdos:USB3.2 FLASH DRIVE:;
1:1049kB:124GB:124GB:::boot;
2:124GB:124GB:33.6MB:fat16::esp;
mapper/system-root:1649GB:dm:512:512:loop:Linux device-mapper (linear):;
1:0.00B:1649GB:1649GB:btrfs::;
mapper/system-swap:32.7GB:dm:512:512:loop:Linux device-mapper (linear):;
1:0.00B:32.7GB:32.7GB:linux-swap(v1)::;
mapper/cryptroot:1681GB:dm:512:512:unknown:Linux device-mapper (crypt):;
mapper/ventoy:2631MB:dm:512:512:msdos:Linux device-mapper (linear):;
2:293kB:4643kB:4350kB:::esp;
nvme0n1:2048GB:nvme:512:512:gpt:KINGSTON SKC3000D2048G:;
1:1049kB:106MB:105MB:fat32:EFI system partition:boot, esp;
2:106MB:123MB:16.8MB::Microsoft reserved partition:msftres;
3:123MB:367GB:367GB:ntfs:Basic data partition:msftdata;
4:367GB:2048GB:1681GB:::lvm;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1
└─sda2 ntfs 98A020CFA020B622 SSD (Games)
sdb
├─sdb1 8f218abf-cff7-4a5d-a399-ca697c4a13e5 Microsoft reserved partition
└─sdb2 ntfs 9016854A168531F0 9c66e9ad-1fce-4e27-a83a-b53c75489b5d WD blue Basic data partition
sdc
├─sdc1 05bc2c8b-7a17-11e4-a6e6-902b3459001f
└─sdc2 ntfs 987400EF7400D244 55633813-917b-11ea-8497-7085c257bf72 WD Green (Media)
sdd
├─sdd1 exfat 4E21-0000 6fb262b0-01 Ventoy
│ └─ventoy
└─sdd2 iso9660 2023-12-23-05-05-55-00 Boot-Repair-Disk 64bit
nvme0n1
├─nvme0n1p1 vfat 7CF7-E0E8 f38dff69-12b5-4493-b842-7274b23909e5 EFI system partition
├─nvme0n1p2 20f19d62-6d22-48df-9d48-548682894369 Microsoft reserved partition
├─nvme0n1p3 ntfs 282A00EC2A00B938 ca2bfd6e-d953-4d40-b366-d5629696229c Basic data partition
└─nvme0n1p4 crypto_LUKS 1899b5a5-deaf-47c5-8621-093815f140f6 98e3d16c-221a-4791-9d60-c1001bc0fde7
└─cryptroot LVM2_member hhpYGj-SpFe-2F4Z-KTCB-oVDT-BrsO-dbMiCO
├─system-swap swap 53cf0f37-f698-40e4-b593-033a5f77cf72
└─system-root btrfs ecb6d7f3-993f-49a0-9d29-f01ef4810405
Mount points (filtered): _______________________________________________________
Avail Use% Mounted on
/dev/mapper/system-root[/@/.snapshots/1/snapshot] 1.5T 0% /mnt
/dev/mapper/ventoy 0 100% /cdrom
/dev/sda2 104.2G 89% /mnt/boot-sav/sda2
/dev/sdb2 29.9G 99% /mnt/boot-sav/sdb2
/dev/sdc2 100.3G 97% /mnt/boot-sav/sdc2
Mount options (filtered): ______________________________________________________
/dev/mapper/ventoy iso9660 ro,noatime,nojoliet,check=s,map=n,blocksize=2048,iocharset=utf8
/dev/sda2 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
/dev/sdb2 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
/dev/sdc2 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
============================== ls -R /dev/mapper/ ==============================
/dev/mapper:
control
cryptroot
system-root
system-swap
ventoy
================================= User choice ==================================
Is there RAID on this computer? yes
==================== blkid (filtered) before lvm activation ====================
/dev/nvme0n1p3: BLOCK_SIZE="512" UUID="282A00EC2A00B938" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="ca2bfd6e-d953-4d40-b366-d5629696229c"
/dev/nvme0n1p1: UUID="7CF7-E0E8" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="f38dff69-12b5-4493-b842-7274b23909e5"
/dev/nvme0n1p4: UUID="1899b5a5-deaf-47c5-8621-093815f140f6" TYPE="crypto_LUKS" PARTUUID="98e3d16c-221a-4791-9d60-c1001bc0fde7"
/dev/sdd1: LABEL="Ventoy" UUID="4E21-0000" BLOCK_SIZE="512" TYPE="exfat" PTTYPE="dos" PARTUUID="6fb262b0-01"
/dev/sdb2: LABEL="WD blue" BLOCK_SIZE="512" UUID="9016854A168531F0" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="9c66e9ad-1fce-4e27-a83a-b53c75489b5d"
/dev/mapper/ventoy: BLOCK_SIZE="2048" UUID="2023-12-23-05-05-55-00" LABEL="Boot-Repair-Disk 64bit" TYPE="iso9660" PTUUID="14eb2669" PTTYPE="dos"
/dev/sdc2: LABEL="WD Green (Media)" BLOCK_SIZE="512" UUID="987400EF7400D244" TYPE="ntfs" PARTUUID="55633813-917b-11ea-8497-7085c257bf72"
/dev/sda2: LABEL="SSD (Games)" BLOCK_SIZE="512" UUID="98A020CFA020B622" TYPE="ntfs"
/dev/sdd2: BLOCK_SIZE="2048" UUID="2023-12-23-05-05-55-00" LABEL="Boot-Repair-Disk 64bit" TYPE="iso9660" PTUUID="14eb2669" PTTYPE="dos"
/dev/mapper/cryptroot: UUID="hhpYGj-SpFe-2F4Z-KTCB-oVDT-BrsO-dbMiCO" TYPE="LVM2_member"
/dev/mapper/system-swap: UUID="53cf0f37-f698-40e4-b593-033a5f77cf72" TYPE="swap"
/dev/mapper/system-root: UUID="ecb6d7f3-993f-49a0-9d29-f01ef4810405" UUID_SUB="92ff29f4-5b10-412b-944f-b856026ad9b5" BLOCK_SIZE="4096" TYPE="btrfs"
/dev/nvme0n1p2: PARTLABEL="Microsoft reserved partition" PARTUUID="20f19d62-6d22-48df-9d48-548682894369"
/dev/sdb1: PARTLABEL="Microsoft reserved partition" PARTUUID="8f218abf-cff7-4a5d-a399-ca697c4a13e5"
/dev/sdc1: PARTUUID="05bc2c8b-7a17-11e4-a6e6-902b3459001f"
================================ LVM activation ================================
modprobe dm-mod
vgscan --mknodes
Found volume group "system" using metadata type lvm2
vgchange -ay
2 logical volume(s) in volume group "system" now active
lvscan
ACTIVE '/dev/system/swap' [30.47 GiB] inherit
ACTIVE '/dev/system/root' [<1.50 TiB] inherit
blkid -g
Unusual RAID (no raid in blkid).
=================== blkid (filtered) before raid activation ====================
/dev/nvme0n1p3: BLOCK_SIZE="512" UUID="282A00EC2A00B938" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="ca2bfd6e-d953-4d40-b366-d5629696229c"
/dev/nvme0n1p1: UUID="7CF7-E0E8" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="f38dff69-12b5-4493-b842-7274b23909e5"
/dev/nvme0n1p4: UUID="1899b5a5-deaf-47c5-8621-093815f140f6" TYPE="crypto_LUKS" PARTUUID="98e3d16c-221a-4791-9d60-c1001bc0fde7"
/dev/sdd1: LABEL="Ventoy" UUID="4E21-0000" BLOCK_SIZE="512" TYPE="exfat" PTTYPE="dos" PARTUUID="6fb262b0-01"
/dev/sdb2: LABEL="WD blue" BLOCK_SIZE="512" UUID="9016854A168531F0" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="9c66e9ad-1fce-4e27-a83a-b53c75489b5d"
/dev/mapper/ventoy: BLOCK_SIZE="2048" UUID="2023-12-23-05-05-55-00" LABEL="Boot-Repair-Disk 64bit" TYPE="iso9660" PTUUID="14eb2669" PTTYPE="dos"
/dev/sdc2: LABEL="WD Green (Media)" BLOCK_SIZE="512" UUID="987400EF7400D244" TYPE="ntfs" PARTUUID="55633813-917b-11ea-8497-7085c257bf72"
/dev/sda2: LABEL="SSD (Games)" BLOCK_SIZE="512" UUID="98A020CFA020B622" TYPE="ntfs"
/dev/sdd2: BLOCK_SIZE="2048" UUID="2023-12-23-05-05-55-00" LABEL="Boot-Repair-Disk 64bit" TYPE="iso9660" PTUUID="14eb2669" PTTYPE="dos"
/dev/mapper/cryptroot: UUID="hhpYGj-SpFe-2F4Z-KTCB-oVDT-BrsO-dbMiCO" TYPE="LVM2_member"
/dev/mapper/system-swap: UUID="53cf0f37-f698-40e4-b593-033a5f77cf72" TYPE="swap"
/dev/mapper/system-root: UUID="ecb6d7f3-993f-49a0-9d29-f01ef4810405" UUID_SUB="92ff29f4-5b10-412b-944f-b856026ad9b5" BLOCK_SIZE="4096" TYPE="btrfs"
/dev/nvme0n1p2: PARTLABEL="Microsoft reserved partition" PARTUUID="20f19d62-6d22-48df-9d48-548682894369"
/dev/sdb1: PARTLABEL="Microsoft reserved partition" PARTUUID="8f218abf-cff7-4a5d-a399-ca697c4a13e5"
/dev/sdc1: PARTUUID="05bc2c8b-7a17-11e4-a6e6-902b3459001f"
==================================== mdadm =====================================
mdadm --assemble --scan
mdadm --detail --scan
RAID detected. You may want to retry after installing the [dmraid] packages.
Warning: no active raid (DMRAID nor MD_ARRAY).
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility will purge (in order to fix packages) and reinstall the grub-efi of
mapper/system-root,
using the following options: nvme0n1p1/boot/efi
Additional repair will be performed: unhide-bootmenu-10s use-standard-efi-file
Confirmation request before suggested repair: __________________________________
SFS detected. You may want to retry after converting Windows dynamic partitioning (SFS partitions) to a basic disk. This can be performed via tools such as TestDisk or EASEUS-Partition-Master / MiniTool-Partition-Wizard.
You may want to retry after mounting your encrypted partitions so that the tool can verify their contents. (cryptsetup open)
Are you sure you want to continue anyway?SFS detected. You may want to retry after converting Windows dynamic partitioning (SFS partitions) to a basic disk. This can be performed via tools such as TestDisk or EASEUS-Partition-Master / MiniTool-Partition-Wizard.
You may want to retry after mounting your encrypted partitions so that the tool can verify their contents. (cryptsetup open)
Are you sure you want to continue anyway?
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your UEFI firmware boot on the openSUSE Tumbleweed entry (nvme0n1p1/efi/****/grub****.efi (**** will be updated in the final message) file) !
If your computer reboots directly into Windows, try to change the boot order in your UEFI firmware.
If your UEFI firmware does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\****\grub****.efi (**** will be updated in the final message)
sprunge.us ko ()