I am unable to start new or existing Hyper-V virtual machines on a Windows 10 Enterprise version 20 H2 laptop (build 19042.685) when a network adapter is attached. Each VM hangs at 10% on startup. ![47572-image.png][1] After a number of minutes the start-up times out with the following error message displayed. ![47556-image.png][2] In Event Viewer the following four events are logged: ![47582-image.png][3] ![47458-image.png][4] ![47562-image.png][5] ![47591-image.png][6] If you disconnect the network adapter from the VM's they start successfully. I have already tried removing and reinstalling the Hyper-V components within Windows 10 using "Turn Windows features on or off" but this has not resolved the issue. The Windows 10 machine is fully patched up to date including the December 2020 Cumulative Update and is running Windows Defender as the anti-virus solution. Any assistance on how to resolve or troubleshoot this issue further will be most appreciated. Thank you. [1]: /answers/storage/attachments/47572-image.png [2]: /answers/storage/attachments/47556-image.png [3]: /answers/storage/attachments/47582-image.png [4]: /answers/storage/attachments/47458-image.png [5]: /answers/storage/attachments/47562-image.png [6]: /answers/storage/attachments/47591-image.png

