I've been trying to play tekkit for the past hour. None of the modpacks work. Showed my friends in skype and tried uninstalling and reinstalling the launcher, I have crash logs in this post
crash-2016-02-28_15.57.08-client.txt
crash-2016-02-28_15.58.53-client.txt
crash-2016-02-28_15.59.09-client.txt
crash-2016-02-28_16.04.46-client.txt
crash-2016-02-28_16.03.42-client.txt