Problem Symptom: Windows users are reported that Oracle VM VirtualBox failed to open a session when try to start on Windows 10 after Windows Updates installed.
The detailed error message as below:
Failed to open a sessionn for the virtual machine
This article will cover the troubleshooting steps to fix Virtual Box VM failed to open or start in Windows 10.
Content Summary
Potential Causes
Solution 1: Update Oracle VM VirtualBox and Windows
Solution 2: Enable Hyper-V Windows feature
Solution 3: Disable Driver Integrity Checks
Solution 4: Set Paravirtualization Interface to KVM
Reference
Potential Causes
- Outdated Oracle VM VirtualBox software
- Missing Hyper-V
- Driver conflict
Solution 1: Update Oracle VM VirtualBox and Windows
Make sure to update Oracle VM VirtualBox from virtualbox.org and install the latest update for Windows 10.
Solution 2: Enable Hyper-V Windows feature
Step 1: Open the Start Menu.
Step 2: Search for the Control Panel and open it.
Step 3: Click on the Programs.
Step 4: Click on the link for Turn Windows features on or off.
Step 5: Check the Hyper-V.
Step 6: Click on the OK button.
Solution 3: Disable Driver Integrity Checks
Step 1: Click on the Search icon in the Taskbar to open Search box.
Step 2: Type cmd in the Search box.
Step 3: Click the Run as administrator to open elevated Command Prompt.
Step 4: The User Account Control (UAC) window will prompt. Click Yes to run the Windows Command Prompt as Administrator.
Step 5: Type or copy-paste the following command into the elevated command prompt and press Enter:
bcdedit.exe /set nointegritychecks on
Solution 4: Set Paravirtualization Interface to KVM
Step 1: Open the Oracle VM VirtualBox from the Start menu.
Step 2: Click the Settings > System > Acceleration.
Step 3: Set the Paravirtualization Interface to KVM.
Step 4: Click on the OK button.
Reference
- VirtualBox error “Failed to open a session for the virtual machine”
- Failed to open a session for the virtual machine
- Failed to open session.
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Alex Lim
Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook
