Desktop Notification Alerts

Desktop Notification Alerts

Is it possible to have certain popup notifications created for the following:

 1. Alert during day to inform user to leave there PC on so maintenance can be performed after hours.

 2. Alert after maintenance or windows patches done  -  informing user that the job was done (this shows our employees we are doing something )

 3. If patch deployed requires reboot create a nag alert to reboot PC every hour until user reboots (with reboot button if possible)

Please if possible can someone leave me clear instructions, if a script may I have a copy.

Is there a suggested place to find scripts to use in DC?

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