Now, you could download it now to have a shoot. AOMEI Partition Assistant Standard is designed for Windows Vista, XP, 7, 8, 8.1, and 10.

Tips: The steps are the same as WINRETOOLS partition deletion if you want to delete Image or DELLSUPPORT partition. 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. In the next window, press Proceed button to confirm the WinRE Tools partition deletion. Partition 9: Unallocated 1MiB - not a partition, rounding on unallocated space. Partition 5: Windows10_OS - Windows main c: drive Partition 4: Unknown 128MiB partition - required by Windows. Partition 2: SYSTEM_DRV - ESP or required for UEFI boot by all systems. Partition 1: WINRE_DRV - Windows recovery

If you do a Lenovo backup it may offer to delete #8 the PBR_DRV. You may later find you must use Windows for one application or want to sell system and buyer only Wants Windows.