Okay thats good, standard Kubuntu partition scheme so your issue is not from that.
So the culprit is probably you not having your windows drives not connected during the Kubuntu install, like I said most likely Kubuntu is trying to load your windows drives during boot.
In any case here is how to (possibly) fix your issue, first read up on how to use Muon, spelled out in great detail here:
Link Removed
and here is another article covering Muon and its parts:
http://netrunner-mag.com/?p=1167
This guide is mainly for netrunner a linux distro based on Kubuntu but its all practically the same (though the screnshots have a different menu setup then the one in Kubuntu, in Kubuntu you have a handy search tool in the menu and in there to search for Muon if you cant find it off the bat, also it gives detail to install chromium... you dont have to its just giving an example of how you normally install apps using Muon)
Muons pretty easy to use in any case, with that tool you can install ntfs-config.
after installing just follow this guide on using ntfs-config:
http://www.dedoimedo.com/computers/automount_ntfs.html
Note: that was dated back in 2008 but the tool has changed just a little but nothing confusing should come up, ignore its instructions on installing as if you followed the muon guide you wont need to re install it.
And also note there is a bug in some version of ntfs-config, the primary program window where you select the drives wont close after hitting the "apply" button
just switch to its secondary window (it opens two windows) and select what you want there, hit "apply" and close both off.