Windows 10: How to sign an existing partition to EFI partition with diskpart

I was trying to install linux on my UEFI mode windows 10 laptop couple days ago, unfortunately there's something went wrong during the installation process, the grub directly wrote data in my win10 system boot partition. Luckily I saved my data and all the partition still in hard disk. Now I am using command prompt to do recovery, the partition table shows that the system partition 1, size 260mb EFI partition, there's no symbol marked beside, I believe it's changed by the linux and win10 boot data are corrupted, my idea is to sign this partition as EFI and format it again, then bcdboot files later. What command should I use next? Thanks a lot!

ps:
partition 3 - windows C:\
partition 5 - windows D:\
partition 6-9 my installed linux





:)

 

Windows 10 not booting

difference too. I recreated the efi partition with diskpart but that didn't help too.

 

Formating Efi system partition as FAT32

During an install you can remove all the critical partitions, of which the EFI System partition is one. You do not have to pre-format a drive during an install. Just remove the Critical partitions ( MSR, EFI, Recovery and OS)and leave unallocated space.
The install will take care of the rest.

You can delete the partition and use the Diskpart create partition EFI command with qualifiers, if necessary. If you have already created the partition, try using Diskpart from a command prompt (Shift+F10 during the install) and format.

If you need to convert a drive from MBR to GPT or vice versa, you need to remove ALL partitions.

 

You cannot use UEFI and Secure boot with Linux on consumer equipment. It is made to work with certain Server hardware.

Turn off UEFI and Secure boot in thr bios and you should be able to install Linux.

 

Thx for your advice, I know that Linux couldn't install under UEFI mode or enable Secure boot, both are disable already, at the moment I am not worry about too much Linux since I can reinstall later, I really want my windows back to work.

 

To make the existing partition 1 an EFI System partition, the command is:

select part 1
set id=c12a7328-f81f-11d2-ba4b-00a0c93ec93b override

Code: DISKPART> help set id Changes the partition type field for the partition with focus. Syntax: SET ID={<BYTE> | <GUID>} [OVERRIDE] [NOERR] ID={<BYTE> | <GUID>} Specifies the new partition type. For master boot record (MBR) disks, you can specify a partition type byte, in hexadecimal form, for the partition. Any partition type byte can be specified with this parameter except for type 0x42 (LDM partition). Note that the leading '0x' is omitted when specifying the hexadecimal partition type. For GUID partition table (GPT) disks you can specify a partition type GUID for the partition. Recognized GUIDs include: EFI System partition: c12a7328-f81f-11d2-ba4b-00a0c93ec93b Basic data partition: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 Any partition type GUID can be specified with this parameter except for the following: Microsoft Reserved partition: e3c9e316-0b5c-4db8-817d-f92df00215ae LDM Metadata partition on a dynamic disk: 5808c8aa-7e8f-42e0-85d2-e1e90434cfb3 LDM Data partition on a dynamic disk: af9b60a0-1431-4f62-bc68-3311714a69ad Cluster Metadata partition: db97dba9-0840-4bae-97f0-ffb9a327c7e1 Other than the limitations mentioned, DiskPart otherwise does not check the partition type for validity except to ensure that it is a byte in hexadecimal form or a GUID. OVERRIDE Enables DiskPart to force the file system on the volume to dismount before changing the partition type. When changing the partition type, DiskPart will attempt to lock and dismount the file system on the volume. If this parameter is not specified, and the call to lock the file system fails, (because some other application has an open handle to the volume), the entire operation will fail. When this parameter is specified, the dismount is forced even if the call to lock the file system fails. When a file system is dismounted, all opened handles to the volume will become invalid. NOERR For scripting only. When an error is encountered, DiskPart continues to process commands as if the error did not occur. Without the NOERR parameter, an error causes DiskPart to exit with an error code. Intended for Original Equipment Manufacturer (OEM) use only. A partition must be selected for this operation to succeed. Caution: Changing partition type fields with this parameter might cause your computer to fail or be unable to start up. Unless you are an OEM or an IT professional experienced with GPT disks, do not change partition type fields on GPT disks using this parameter. Instead, always use the CREATE PARTITION EFI command to create EFI System partitions, the CREATE PARTITION MSR command to create Microsoft Reserved partitions, and the CREATE PARTITION PRIMARY command without the ID parameter to create primary partitions on GPT disks. This command does not work on dynamic disks nor on Microsoft Reserved partitions. Example: SET ID=07 OVERRIDE SET ID=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7[/quote]

 

Thank you so much for the info, I successfully set the partition as EFI, I also did copied the boot file into it but unfortunately it still didn't work out, I can't see windows boot manager in my bios and my hard disk is still invisible in the boot menu, my windows still can't boot, after couple days hard working, I gave up. Now am waiting for my Asus laptop recovery media which includes a factory re-install image from Asus service center, to see if I could reset my laptop and do a clean reinstall. *Sick

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