Do I requirement an HD monitor to scene HD movies on my computer?

Answer:

No, you might know how to use your old monitor. A true HD TV display descriptions at 1080p aka 1920x1080 resolution in computer language. Your current computer monitor should be able to display but I don`t know not if it is a cheap one. If you right click on your desktop and choose Properties ->Settings-> and look under peak size...Turn that slider all the style to the right. If your computer can handle a resolution of 1920x1080 or greater later you're golden, otherwise you might have to grasp a better monitor (or a better graphics card).