Follow these steps:
1) From Windows Start Menu find Administrative Tools and Start Task Scheduler.
2) In the Action Pane select "Create Task". A five-tabbed dialog will open. Give the new task a Name and if inclined provide a Description. Security options are also available; tick if necessary.
3) Tab Triggers and click on the New button to make an assignment. The trigger will begin when you say it will by selecting the appropriate options in the dialog that pops up. OK/Cancel to accept/start-again.
4) Tab Actions. Here you have the option of starting another program or not when the alarm goes off. Ok/cancel, etc.
5) Tab Conditions. Further directions to filter the choice under actionable contingencies. Can wake to snooze if so ordained.
6) Tab Settings. Here you can stop any transmission of notification as previously proscribed in the previous panels.
7) OK. Closes the setup dialog and in the center window of the console successful task schedule has taken place if the name of the new creation appears in the list. It has a Status and TS shows when in the column one click to the right. If the new name doesn't appear then creation has not taken place. Start at step 1) and try again.
Now wait for the event to happen ...