Safe to remove partitions

I want remove windows from dual boot and want to use ubuntu full time What partitions can I remove. I don't understand some of the partitions.

Partition 1: WINRE_DRV
Partition 2: SYSTEM_DRV
Partition 3: LRS_ESP(
Partition 4: Unknown 128MiB partition
Partition 5: Windows10_OS
Partition 6: ext4
Partition 7: linux-swap
Partition 8: PBR_DRV
Partition 9: Unallocated 1MiB

1 Answer

First do a full backup of Windows. You paid for it. You may later find you must use Windows for one application or want to sell system and buyer only Wants Windows.

If you do a Lenovo backup it may offer to delete #8 the PBR_DRV.

Partition 1: WINRE_DRV - Windows recovery
Partition 2: SYSTEM_DRV - ESP or required for UEFI boot by all systems.
Partition 3: LRS_ESP - Lenovo specific .efi files
Partition 4: Unknown 128MiB partition - required by Windows.
Partition 5: Windows10_OS - Windows main c: drive
Partition 6: ext4 - Linux
Partition 7: linux-swap
Partition 8: PBR_DRV- Lenovo backup
Partition 9: Unallocated 1MiB - not a partition, rounding on unallocated space.

If you have done the full backup, you only need 2, 6 & 7 for Ubuntu (and #2 & your data, configuration/settings and list of installed apps in #6 should also be backed up), but then may want /home or data partitions to keep operating system separate from data.