Windows 7 keeps trying to re-install itself despite already installing.

Hello again!

Last night I finally got Boot Camp to work and installed Windows 7 onto my Macbook Pro (Retina, 13-inch, Late 2013)! It worked completely fine last night, then I shut down my laptop for the night. This morning, I tried to load up my Windows 7, but it brings me to the installation again, but this time I can't use my mouse or my keyboard... I'm not entirely sure what to do. It was completely fine last night. I can open up my iOS just fine and the partition is still there, haven't messed with it at all. Any help?