When you copy the part of article from wikipedia or some information website which contain HTML links, this HTML link will remain its blue color and underline once you paste this article on your Microsoft Word or PowerPoint.
Here are the way to solve it.
Using Ctrl + Alt + C when you copy and paste it with Ctrl + Alt + V~
Here are the result:
P/S: This copy and paste only affect those html link only. The number such likes [1] will remain its position so you have to delete it by yourself.
Have fun and enjoy it. =)