[ubuntu] Software Center has stall during an install of Crossover

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http://ubuntuforums.org – HI I download a trial version of Crossover and started to install it using Ubuntu Software Center. As the install was about to finish it stopped and would not complete. I switched of and restated the Software Center but it is still trying to carry on installing. Each time i close the Software Center it goes back to the point it was previously stalled at. Is there a way to cancel an install and try again. I am using 12.04 Advent Laptop, 250gb hard drive, 3gb ram. Celeron [email protected] GHz Thanks for reading my post (Hardware)