Windows 10: How to determine offset for creating new EFI partition?

Ok, so, here's the whole story. I did a new clean install of windows 10 pro a few weeks ago, and I installed the newest version at the time, 1809 build 17763.316. However, now there is a newer version, 17763.348. And I've been getting the update KB4482887 from windows update, but every time it fails with error 0x800F0922. I've tried many different things - sfc /scannow, dism restore health, disabling secure boot, disabling all security software including my firewall, making sure my efi system partition has enough space (currently 83 mb free out of 96 shown in explorer), downloading the kb installation file from microsoft's catalog directly, making sure I have .net framework activated from optional features, I tried .net framework repair tool, cleaning the software distribution and catroot2 folders (even tho I don't think this should matter when using the catalog installation file), deleting registry keys as shown here Full Fix: Update error 0x800f0922 on Windows 10, 8.1, 7 and restoring them after it failed, cleaning my temp folder. I have the latest servicing update KB44704788 installed as well, so Idk what to do anymore... I read that extending the system partition might solve it, mine is only 100 mb, shows as 96 mb in explorer. Then I searched how to do that, and since I use GPT and UEFI, turns out it's a bit harder, I found this How do I restore w10 bootloader? dual boot with ubuntu on separate hdd Solved - Page 3 - Windows 10 Forums and there it says that if I have unallocated space, which I must have if I want to make a bigger efi partition right? then I need to set an offset for the new efi partition, but it doesn't say how big that offset must be and how to determine it, my current offsets are like this:





And this is my unallocated space:





Anyone can help me with what to do, other that clean install again?

:)

 

UNMOUNTABLE_BOOT_VOLUME after creating new EFI System Partition

I would probably have booted to a Windows install or recovery media to create the

EFI system partition by using Diskpart and the create par efi command with any modifiers necessary to make it fit in the correct location.

I know Linux can use a Microsoft EFI partition but I do know if Windows can use a Linux version.

Yes, the bcd listing which shows the boot manager and OS loader.

It may have been easier to use a third party partition manager to change the size of the EFI partition.

If you might need it, here are the details of an EFI partition from Diskpart.

Partition 2

Type : c12a7328-f81f-11d2-ba4b-00a0c93ec93b

Hidden : Yes

Required: No

Attrib : 0X8000000000000000

Offset in Bytes: 524288000

Volume ### Ltr Label Fs Type Size Status Info

---------- --- ----------- ----- ---------- ------- --------- --------

* Volume 3 FAT32 Partition 99 MB Healthy System

 

UNMOUNTABLE_BOOT_VOLUME after creating new EFI System Partition

My question would be, how are you booting the two OSes? When I was doing that I had both installed as UEFI and used the boot device menu to switch between the bootable OS. Of course, I had mine on separate drives but it should work with both on one drive.

I don't see how you filled up your UEFI partition since it only adds a small amount of data to the partition.

How did you create the new EFI System partition?

Are you able to get a Bcdedit listing?

 

Move EFI partition

its to enable win 10 to update to its anniversary edition.. it cant do this due to lack of C drive space i have had a quick try with the trial version of easus.. it didnt seem to be able to do what i want..

i am assuming i cant just delete the efi partition but maybe i could.. as yet i havnt even figured out how to get into the bios of the thing.. maybe that should be my next step.. *Smile

diskpart could probably do it but figuring out how (it aint that user friendly) might be difficult without step by step instructions..

trog