Program won't start (0xc0000135) error

Thank you for contacting the Quicken Community, though I do apologize that you are experiencing this error when attempting to open your Quicken application. 

If you don’t mind, could you please provide a screenshot of the error message you described receiving? If needed, please refer to this Community FAQ for instructions on how to attach a screenshot. Alternatively, you can also drag and drop screenshots to your response if you are not given the option to add attachments.