VirtualBox fails to open a session with VERR_NEM_MAP_PAGES

This tutorial guides you on how to resolve NEM failed to map page(s) into the VM. (VERR_NEM_MAP_PAGES_FAILED) i.e., Virtual box failed to open a session for the virtual machine.

VirtualBox fails to open a session with VERR_NEM_MAP_PAGES_FAILED

You might be facing the below Virtual Box Error while opening virtual machine session in Windows as shown in the picture below.

Approach to solve

To solve the below error I tried the following ways.

NEM failed to map page(s) into the VM. (VERR_NEM_MAP_PAGES_FAILED).
Result Code:
E_FAIL (0x80004005)
Component:
ConsoleWrap
Interface:
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

1: Go to control panel and search for “Turn Windows features on or off” and open.

2: And make sure, the following features are unchecked: “Windows Sandbox” and “Hyper-V“

3: Now, restart your machine and check if that solves the Virtual Box error.

4: If it still does not work, try unchecking the following feature option too from “Turn Windows features on or off” as shown in the picture below.

5: Now, restart again the error should go away.

Note: It worked for me after I unchecked “Virtual Machine Platform” from Windows features in Windows 10 Enterprise.

Therefore, in order to run virtualization application or software you may need to disable some windows features. Because virtualization software will not work together with Hyper-V and Virtual Machine Platform.

Hope this helped 🙂

Also See:

VirtualBox fails to open a session with VERR_NEM_MAP_PAGES_FAILED

Approach to solve

References: