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Partition 3 is the current active recovery partition and partition 4 is the original and now obsolete recovery partition. In the screenshot above, you will see two recovery partitions– Partitions 3 and 4. These partitions do not display under ThisPC and you will need to go to Disk Management in order to view them: I might be getting off the subject a bit, but I think the new boot process is relevant to the issue.If you’ve been a Windows 10 user since its first release, or have been updating Windows 10 through multiple new builds, you will likely see that your hard drive now contains more than one recovery partition. You can also use WinRE to alter the boot sequence, but my UEFI does not provide for permanently saving the altered sequence. The simplest way to invoke WinRE is to hold down the Shift key while clicking on Restart. WinRE in Windows8/8.1 has an excellent GUI that allows you to Refresh, Reset, or Troubleshoot your PC before Windows loads. A side benefit is the boot process is much quicker than with the older BIOS configuration. It’s all part of trying to keep malware from imbedding itself in the boot sequence.
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Both the EFI partition and the WinRE partition are involved and, along with the UEFI firmware, replace the MBR that previously resided on the C partition. That’s how I learned that the boot process for Windows8/8.1 is significantly different from previous versions. The GParted editor in Ubuntu shows all partitions, and I can even see the folders and files within a partition. Not all partitions are shown and the percent usage is wrong. Windows Disk Management shows incorrect and incomplete results. If I mess something up on the Windows side, I can fix it from the Ubuntu side. My alternative was to first create a dual boot setup with Ubuntu Linux.
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Unfortunately, swapping drives is a lot more difficult with a laptop. If I had a desktop PC with a quick swap bay, I would definitely follow your suggestion to experiment with a scratch drive.
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