Set up hotkeys for start and stop recording. Make sure the option to confirm when starting/stopping recording is disabled in advanced options.
From there, you can invoke a hotkey to perform the action however you'd like.
For example, you can set up an AHK script to invoke a hotkey (create one for each that you have set up... this one is for Ctrl-F11):
Code:
Send {Ctrl Down}{F11 Down}
Sleep, 50
Send {F11 Up}{Ctrl Up}
Then, you can use Task Scheduler to run the script at the specified times.