[Linuxephus™]

@bluedog.tar.gz
@chmod
@Linuxephus
Thank you for help guys, I am going to re-intall it using standard dual boot setup as Linuxephus said.

Good.
That will remove any needless complications that arise from an "installer" that was primarily designed for Ubuntu and Ubuntu alone.
Not counting the minor modifications apparently made to allow Kubuntu to utilize the same "installation".
In this case, Wubi has introduced an undesirable affect with Kubuntu.
So you remove that complication by simply installing Kubuntu as a dual boot scenario instead.
And both operating systems live happily ever after.