Windows 10: Accidentally nuked the EFI system partition, how can I repair it?

Currently, I'm (unsuccessfully) dual-booting Windows 10 with Gentoo Linux on my laptop.
During my Gentoo install, I accidentally deleted all the files in my EFI system partition. How can I fix this? I really don't want to have to do a reinstall of Windows.

If I do, I will then need to take it to my highscools IT to connect it back up to their network, which ussually takes them a couple days, AND last time I took something to them they deleted my Gentoo partition, which takes ages to install on my feeble laptop since it compiles the entire OS before installing. So I'd really like to avoid doing that at all costs.

Is there a way to JUST fix boot issues in Windows's installer (and not totally reinstall Windows)? I don't mind if it overwrites all my Linux stuff in my EFI partition, I'll just back it up and fix things from a Linux livecd.

Thanks for the help in advance

Or even if the installer won't help me with this, I'm totally comfortable doing everything manually like placing files, making sure the Windows bootloader knows what partition to boot, etc. But I can't find much about doing any of that (nor can I find any of the files that would be required online).

:)

 

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

 

EFI system partition

This is normal-What problems are you having with this?

I would try to explain the purpose with the following:

Suppose your C:/ gets corrupted and there is no recovery partition.

EFI partition allows you to boot to advanced Startup options where you can:

Initiate a startup repair.

Do a System restore

Etc..

 

EFI System Partition

So, an EFI system partition is perfectly normal on a Windows 10 disk (I assumed you've done an internet search and discovered that this partition is for booting your system).

Are you trying to backup the contents of this partition?.... if so, what software are you using?