Joke.Win.Aloap is not a trojan (altough some programs report it as such) but a joke program.
After being run it starts to shake current and all further opened application windows. This works under all versions of MS Windows.
To deactivate the joke you should open Task Manager and kill 'Aloap Window' process.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
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