Restore to a previous version of ESXi

Note:-Best practice is always backup your ESXi configuration and VMs data before making any change.

Steps:

Access over remote console cards such as IMM,RSA, iLO, DRAC or direct attached screen:

1. In the console screen of the ESXi host, press Ctrl+Alt+F2 to see the Direct Console User Interface (DCUI) screen.
2. In the DCUI screen, press F12 to view the shutdown options for the ESXi host.
3. Press F11 to reboot.
4. When the Hypervisor progress bar starts loading, press Shift+R. You see a pop-up with a warning:

5. New screen appear with ESXi build listed

Current default hypervisor will permanently be replaced
with build: X.X.X-XXXXXX. Are you sure? [Y/n]

6. Press Shift+Y to roll back the build.
7. Press Enter to boot.