Awkward-Cat-9346

For some reason, on my dell vostro 14-5480, when ever some thing is wrong with windows, when I restart, it boots on to tiny core Linux with no ui ( just the command line). I wonder how did it get installed, and I never heard about it. I once upgraded my laptop to a SSD and 8gb of ram, so how do I get out of this and get this thing into windows???