I will be the person helping you today.
I can see that you may need a little bit of extra help. Several things can cause your Mac to boot up slowly.
May I ask if you still need help with this problem? If so, may I start a screen sharing session on your computer and help you resolve the problem?
Once the remote session begins, we will be able to communicate via a chat window on your computer.
I would prefer that you provide me with steps for now.
There is no way for me to know what the issue is without first, analyzing the problem. How about this; follow the all of the instructions on the following page: http://www.chriswrites.com/10-ways-to-speed-up-mac-startup-times/
After you complete the instructions on that page, you shouldn't have any more problems.
I look forward to hearing your feedback concerning whether or not your problem is fixed.
I will be standing by,Jason