Just a suggestion. No guarantees.
*** you have a touch computer. I am not sure my method below will apply to you****
Go to Power Options > on the right side of your selected power plan, click Change plan settings > click Change advanced power settings > scroll to Sleep, expand (click the + sign) the options and make sure sleep is disabled > scroll to Multimedia settings > expand "When sharing media", make sure both options are set at " Prevent idling to sleep" > OK when done.