If you want to perform a clean install and use an even older CPU, you can also perform an unofficial bypass on the TPM and CPU checks during the Windows installation process. Setting that option to true fixed the lags I had in the Windows 11 virtual machine., so try that to see if it helps you.

If you are using the free version of VMWare Workstation Player, you can edit your VMX file to add the following line to it. The option can be found here: Edit Virtual Machine Settings > Options >Advanced >Settings.Ī solution for this issue was available at the company's community forums. The support article mentions an option that you can toggle, but it seems to be exclusive to the Workstation Pro version. It turns out the message about side channel mitigation appears when Hyper-V is enabled in the host, Windows. I'm not really sure if it has something to do with the Trial version of the Pro variant that I had been using, so I ignored it and tried using the VM, but it was really slow and simple actions like opening files took a long time to complete. It said that there maybe some performance degradation with side channel mitigations enabled. On a side note, VMware Player recently started displaying a warning on my computer. How to disable side channel mitigations in VMware Player If you want further confirmation that TPM is working correctly, install and run the PC Health Check app in your VM, and it should no longer say that your computer doesn't support TPM 2.0. Access the virtual machine's settings, and it will list TPM as an option, though you can't edit it with the free version of the application. If you shut down the operating system, and run VMware Workstation Player again, you will see a padlock icon next to the OS indicating that it encrypted. You may use Window Insider Preview ISOs too. Start the application, and install Windows 11 normally.

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