A trademark is an easily recognizable symbol, phrase, or word that denotes a specific product. It legally differentiates a product or service from all others of its kind and recognizes the source company's ownership of the brand.
"Copyright" literally means the right to copy but has come to mean that body of exclusive rights granted by law to copyright owners for protection of their work. Copyright protection does not extend to any idea, procedure, process, system, title, principle, or discovery.
Fair use is a doctrine in United States law that permits limited use of copyrighted material without having to first acquire permission from the copyright holder.
One technical issue I had was on Windows 8.1, with the charm menu not working. The troubleshooting steps to fix it was I did CTRL+SHIFT+ESC to open task manager. I then found Windows Explorer and clicked "Reload." Then everything was fine.
Hope This Helped!