If you pop into chat, I will help you out. Trying to give instructions here will be a nightmare. I don't have any kubuntu dual boots, and a screenshot of Ubunut won't likely help you... but if you open the KDE desktop (under advanced in LMCE), and click the K button where the windows start button would be, Dolphin (the default file manager) will likely be in your quick list (I can't remember for sure). If it is not, with that "start" button open, just type in dolphin, and it will appear as a clickable option. Click it. On the left, you will have a number of folders/drives depending... One of those drives is going to be your windows partition (probably). I should mention that I hate Dolphin, and find it very glitchy.
If you need further help, like I said, drop into freenode.irc at channel #linuxmce, and I will explain how to find it/port it off if it exists.