Without providing any details as to your situation and problem you are responding to a 4 year old post which is probably irrelevant to your situation.
I am going to take a wild swing and guess that you have an external screen hooked up to your laptop and that the problem is not slowness, but the mouse and or objects jumping around the screen. If so go to Page Design tab > Layout group and uncheck Align
to Guides and Objects and see if that helps.
If not read these articles and then repost your questions as a new post with the details needed to help you.
Reference: Suggestions for asking a question on help forums:
http://support.microsoft.com/kb/555375
Reference: How to ask an effective question: http://answers.microsoft.com/en-us/windows/wiki/windows_10-update/how-to-ask-an-effective-question/18584631-7f2b-4f01-88f5-f6660a5943c3
DavidF