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For Notebooks - perform a hard reset.
Perform Diagnostics test.
Perform an MSCONFIG if your computer has it.
Close all other applications to avoid conflicts. Also remove all hardware devices one by one.
Perform a system recovery. Also ensure that you backup your data prior to doing a recovery.
If the problem persists then send in for service.
Check error messages in Event Viewer.
Start >> Settings >> Control Panel >> Administrative Tools >> Computer Management (or Event Viewer)
