warn that this only works with docker right now

cmd/minikube/cmd/stop.go

@@ -99,12 +99,13 @@ func runStop(cmd *cobra.Command, args []string) {
 	schedule.KillExisting(profilesToStop)
 
 	if scheduledStopDuration != 0 {
-		if runtime.GOOS == "windows" {
-			exit.Message(reason.Usage, "the --schedule flag is currently not supported on windows")
-		}
 		if err := schedule.Daemonize(profilesToStop, scheduledStopDuration); err != nil {
 			exit.Message(reason.DaemonizeError, "unable to daemonize: {{.err}}", out.V{"err": err.Error()})
 		}
+		// if OS is windows, scheduled stop is now being handled within minikube, so return
+		if runtime.GOOS == "windows" {
+			return
+		}
 		klog.Infof("sleeping %s before completing stop...", scheduledStopDuration.String())
 		time.Sleep(scheduledStopDuration)
 	}

pkg/minikube/schedule/schedule.go

@@ -17,6 +17,7 @@ limitations under the License.
 package schedule
 
 import (
+	"runtime"
 	"time"
 
 	"github.com/pkg/errors"
@@ -40,6 +41,10 @@ func Daemonize(profiles []string, duration time.Duration) error {
 			out.WarningT("scheduled stop is not supported on the none driver, skipping scheduling")
 			continue
 		}
+		if runtime.GOOS == "windows" && driver.IsVM(cc.Driver) {
+			out.WarningT("scheduled stop is not yet supported with VM drivers on Windows, skipping scheduling")
+			continue
+		}
 		daemonizeProfiles = append(daemonizeProfiles, p)
 		cc.ScheduledStop = scheduledStop
 		if err := config.SaveProfile(p, cc); err != nil {