Mavericks asks for icloud password everytime on startup
I have a Macbook Pro Mid 2012 model. Ever since I upgraded to mavericks I've had several problems (which mostly include sluggish system and poor performance). The most annoying problem is that on every start-up, I get prompted for my iCloud password. Even though I enter it, it always pops up on every start-up. The other problem with this is that the computer takes a while to start up and won't fully function until that pop up message appears. Is there any way to get rid of this annoying message. Here is a screenshot of what it looks like (in the red box I just covered up my email address).
MacBook Pro (13-inch Mid 2012), OS X Mavericks (10.9.1)