We had some friends that had problems with their toddler sleeping and hired a “sleep doctor” who suggested removing everything stimulating (e.g. Toys and pictures) from the bed area. Seemed to work for them.

Just flattened my machine and reinstalled Windows 8 after Windows 10 broke everything (wifi broken, Chrome broken, even my USB external wouldn’t copy files for more than 60 seconds). Everything working perfectly again - thanks for being douchey MS!