Unable to create Windows 10 VM - Failed to set up a loot a device

User Support General
1

I’m trying to set up a Windows 10 VM using this guide https://github.com/Qubes-Community/Contents/blob/master/docs/os/windows/windows-vm41.md

When I try to run a command “qvm-start --cdrom=Social:/home/user/Qubesincoming/DebianUntrusted/Win10_21h2_English_x26.iso WindowsNew”

It returns an error: “Failed to setup loop device for :/home/user/Qubesincoming/DebianUntrusted/Win10_21h2_English_x26.iso”

Also when I try to boot a Windows 10 iso from advanced settings used boot from cd rom button, it says: “Failed to start… not enough memory”

I am running Lenovo Thinkpad x260 with 8gb ram, otherwise I followed all the steps from the guide above. Is it a hardware problem or can it be fixed software wise?

Thanks.

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2

Can someone help me? I am still having this problem.

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3

But did you give enough RAM to the VM?

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I did run commands as described in tutorial to increase ram.

qvm-prefs WindowsNew memory 4096
qvm-prefs WindowsNew maxmem 4096
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I was having the loop device failure issue and boosted the RAM with no effect. So, I unchecked the “Include in memory balancing” box under the advanced tab in settings for the qube. And I then used the Boot qube from CD-ROM feature on the same advanced page of the qube’s settings to point to my .iso file. The Win install then came up. I remember reading that the windows qubes don’t use memory balancing so maybe that was the problem for me. I’m a total noob though so I could be wrong:-) btw, I set the ram at 16384MB initial (my system has 64GB). The Max memory became grayed out once I unchecked the memory balancing box.

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