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Removal and back to Windows

How to remove Seva Client OS and leave the computer with Windows only.

Save your accounts first

logpass.txt and the maFile files will be gone from the disk, with nowhere to restore them from. Copy them to a USB drive or the cloud before you erase anything.

The license, however, needs no saving: it lives on the server, not on the machine. You can reset the key and move the subscription to another computer from the bot at any time — even after the disk is already wiped. Details: Licenses and payment.

We have not tested these scenarios

Working with Windows partitions and the bootloader (diskmgmt.msc, diskpart, bcdboot) has not been verified on our image. What follows is common practice, not an instruction we have validated. Keep a Windows installation USB drive handy.

Three scenarios below. Pick yours.

Scenario 1: Seva on a separate disk, Windows stays​

The easy case. You never touch Windows at all.

  1. Boot into Windows.
  2. Open Disk Management (diskmgmt.msc).
  3. Find the disk Seva is on (the Linux partitions have no drive letter and an unrecognised file system). Check the size and model so you do not confuse it with the Windows disk.
  4. Delete every partition on it, create a new volume and format it as NTFS.

The disk is yours again. What is left is removing the bootloader entry so no GRUB menu appears at power-on:

  1. Open an administrator command prompt.

  2. Mount the EFI system partition and delete the Linux bootloader folder:

    mountvol S: /s
    rmdir /s /q S:\EFI\ubuntu
    mountvol S: /d

  3. In the BIOS, check the boot order: Windows Boot Manager should come first.

Scenario 2: Windows and Seva on one disk​

Here you have to both delete the Linux partitions and restore the Windows bootloader — GRUB is in charge of booting right now, and it leaves together with those partitions.

You will need a Windows installation USB drive — without it, if anything goes wrong, the computer is left with no bootloader at all.

1. Delete the Linux partitions​

  1. Boot into Windows and open Disk Management.
  2. Delete the Linux partitions (no drive letter, unrecognised file system). Do not touch the C: partition, the Recovery partition or the small EFI partition.
  3. Add the freed space to C: (Extend Volume) or create a new volume on it.

2. Restore the Windows bootloader​

Boot from the Windows installation USB drive → Repair your computer → Troubleshoot → Command Prompt, and run:

diskpart
list disk
select disk 0          (the disk with Windows)
list volume
select volume N        (the EFI volume: FAT32, ~100 MB)
assign letter=S
exit

bcdboot C:\Windows /s S: /f UEFI
rmdir /s /q S:\EFI\ubuntu

Reboot. The computer boots straight into Windows and the GRUB menu is gone.

If Windows will not boot

Do not panic: the data is intact, only the bootloader is broken. Run bcdboot C:\Windows /s S: /f UEFI again, making sure S: really is the EFI partition and Windows really is on C:.

Scenario 3: wipe everything and reinstall Windows​

The cleanest option if you need nothing from the disk.

Boot from a Windows installation USB drive and, during the installation, delete all existing partitions — the installer will lay the disk out from scratch.

We will not cover building a Windows USB drive or installing Windows itself — that is standard Microsoft territory:

After Windows is installed, remember to install the motherboard and graphics drivers — Seva Client OS did that for you, Windows does not.