Windows 10: Windows 10 upgrade creates too many partition

Here are the reagentc log:
Code: Microsoft Windows [Version 10.0.14393] (c) 2016 Microsoft Corporation. All rights reserved. C:\Windows\system32>reagentc /info Windows Recovery Environment (Windows RE) and system reset configuration Information: Windows RE status: Enabled Windows RE location: \\?\GLOBALROOT\device\harddisk0\partition5\Recovery\WindowsRE Boot Configuration Data (BCD) identifier: -------------------------------------------------- Recovery image location: \\?\GLOBALROOT\device\harddisk0\partition8\preload Recovery image index: 4 Custom image location: Custom image index: 0 REAGENTC.EXE: Operation Successful. C:\Windows\system32>[/quote] According to reagentc log Partition #5 is the active recovery partition (last RE partition created after windows 10 anniversary update next to OS partition), Partition #8 instead is the HP recovery image image.

 

By definition it must be UEFI as more than 4 primary partitions.

 

Actually, you only need to keep two partitions as a minimum i.e. the FAT32 partition (do not under any circumstances delete this) and the C drive, but also you want to keep the F: partition for sure in your case.

Frankly, keeping recovery partitions on Windows 10 does not really benefit you much as you can simply use an installation usb drive to achieve same end. I actually delete them all to save space.

The 3rd partition of 128 MB can normally be deleted (actually in a fresh w10 install it is now only 16MB) but some say to keep it for future needs. I delete it as you can recreate it anyway. This partition is a bit of a PITA as even 3rd party tools will not move this one, so you can end up with a fair bit of wasted space to left of it.

 

Source: https://msdn.microsoft.com/en-us/win...ive-partitions

You can delete the ones you don't want and shuffle them into the correct order using MiniTool Partition Wizard and then re-register WinRE.