What to do if dualboot install fails repeatedly

CloudReady can only install in dualboot mode alongside a pre-existing Windows installation that meets certain requirements.

(Read about special dualboot requirements in our guide)

One of those special requirements is to ensure, in Windows 8 or 10, that a setting called "Fast Startup" is disabled. If you don't disable Fast Startup prior to starting your installation attempt, then you will get an error with a prompt to go do so.


Unfortunately, there are some circumstances where this Fast Startup error occurs repeatedly, even after the setting has been disabled in Windows. In scenarios like this, the CloudReady dualboot install is seeing a Windows disk condition that it interprets as a state created by hibernation, and so it fails out.

This scenario can also result in no error at all, but an infinite wait where install never completes and the blue-dots animate indefinitely.


It isn't clear what combination of behaviors or circumstances cause these situations, but there is a process that can be followed to help return Windows back to a state that CloudReady allows dualboot installation to proceed alongside. This process is not guaranteed to work, and as always any steps that involve a cmd line, like those below, are not recommended for anyone but experienced users.


Sometimes, when these issues comes up repeatedly, rebooting into Windows once and then back into CloudReady to retry the dualboot install can fix the problem. Always attempt this first.


If you're totally unable to get through dualboot install:

While booted into the CloudReady usb installer on the device you are having dualboot install blockers on:

(This tutorial assumes your internal HDD is "/dev/sda"


1) Log in

2) Get a shell by pressing "ctrl+alt+t", followed by running cmd "shell"

3) Start by running

sudo umount /dev/sda*

4) Now, run the cmd :

sudo ntfsfix /dev/sdaX

four times, replacing X with a different number in {1,2,3,4} each time.

(you may get prompted for a password - it's "chrome")

 (If your Windows disk has more than 4 partitions,  you may need to go up to that number instead of 4)


You may get some output that indicates error, some that indicates success, and sometimes no feedback. No matter what, once you've gone through all four, retry the dualboot install. 

If that also doesn't work, you should proceed to:


1) Boot back into Windows and log in

2) Open a cmd prompt as administrator

3) Run the cmd:

powercfg.exe /hibernate off

4) Next, run the cmd:

chkdsk /f

5) Reboot Windows, letting it run through all disk checks and reboot itself additional times without interruption.

6) Retry CloudReady install.


Again - these things may not improve matters, but it is worth a try!


PS - When you are done with these, or any troubleshooting steps, if you don't succeed, describe your problem in a new post and include all the standard info, including logs.

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