apt-get install returns several errors.

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http://askubuntu.com – I want to get a package installed from Ubuntu Software Center and it's playing up once again. I've had this problem before but the method I used to fix it no longer works. Kdenlive is what i suspect to be causing this as I have seen the exact same problem before where certain files were interfering with the packaging system. Basically, i'm trying to install Unetbootin to my Ubuntu 12.04 netbook. Ubuntu software center crashes on startup, so I have to use the terminal, but now it tells me that the package cannot be parsed or opened. This is the process i took earlier in an attempt to fix the p (HowTos)