[ubuntu] Software Centre not responding

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http://ubuntuforums.org – Hello, guys! I've been experiencing severe problems with the Ubuntu Software Centre lately. The icon appears, when I click it, a blank space appears and nothing happens. When shutting it down, a "Not responding" window appears. I really thought the "not responding" issue was Windows-only. It appears it isn't. I searched for some answers here, but they all involve using the terminal. I've installed 12.04 and I haven't got one. Any ssuggestions and recommendations concerning the matter will be appreciated :) (Hardware)