You have to set correctly the job properties such as schedule time and user account used for the task.
Please check this:
1. ensure that the "Task Scheduler" service is running using Control Panel -> Administrative Tools -> Services.
2. open Control Panel -> Scheduled Tasks;
3. find there "Registry Healer - Autoscan" icon;
4. select the "Details" view from the top menu of explorer to see the "Next Run Time", "Last Run Time" and the "Status" columns;
5. right-mouse-click on the "Registry Healer - Autoscan" icon and select the "Run" command.
6. Click F5 to refresh the view and see the "Status" column;
If the "Status" column has the "Could not start", then the task properties were not configured properly. You should check schedule time and user account and password used for the task.
Note 1. You should set username/password from which account the task should be started - usually Administrator. If Administrator's account has no password the task will not work.
Note 2. Administrator should be logged in to the desktop screen at a start time of the task otherwise you will not see Registry Healer interface and it will be invisible for you.
Note 3. Registry Healer main program should be closed, otherwise Registry Healer task will not start as a second copy.
You may simply check the task: set schedule time to one minute ahead, click OK, close Registry Healer and wait for it's starting.