MacBook :: Slow Start Up And Shut Down

Yesterday my macbook start shutting down and booting up slowly. It used to work so quickly, and now it's taking much longer. The only thing I did was install a printer before it happened. Then when the problem began I uninstalled the printer with the uninstaller that it came with. I thought maybe that was the issue, but uninstalling it didn't seem to make a difference. I checked in the preferences to make sure it is starting up with the hard drive and it is. I'm not sure what else to do. It's not a huge issue, but it is a difference and the fact that it's only about a month old worries me. I do have to add that even though it's slower than it was just 24 hours ago, it's faster than my Dell PC ever was