Disable Update
REG.exe ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update” /v AutoUpdateCheckPeriodMinutes /t REG_DWORD /d 0 /f /reg:64
REG.exe ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update” /v UpdateDefault /t REG_DWORD /d 0 /f /reg:64
Enable Update
REG.exe ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update” /v AutoUpdateCheckPeriodMinutes /t REG_DWORD /d 1 /f /reg:64
REG.exe ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update” /v UpdateDefault /t REG_DWORD /d 1 /f /reg:64
Notes
You can also disable the Google Update service—gupdate—to prevent Chrome from updating.