There are few occasions you would need to revert your Virtual Machine Hardware version so this write-up covers the probable steps one can take to do the conversion
This table lists the virtual hardware version of all ESXi OS.
| Virtual Hardware Version | Products |
| 20 | ESXi 8.0 |
| 19 | ESXi 7.0 U2 (7.0.2) |
| 18 | ESXi 7.0 U1 (7.0.1) |
| 17 | ESXi 7.0 (7.0.0) |
| E | |
| 15 | ESXi 6.7 U2 |
| 14 | ESXi 6.7 |
| 13 | ESXi 6.5 |
| 11 | ESXi 6.0 |
| 10 | ESXi 5.5 |
| 9 | ESXi 5.1 |
| 8 | ESXi 5.0 |
| 7 | ESXi/ESX 4.x |
Snapshot the VM and power off the VM. The file that needs editing is the.VMX file
These are the steps to change VMware hardware version compatibility back to a compatible state
Browse to the datastore location and edit the .vmx file via the vi editor and make the changes
Power up the VM and remove the snapshot
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