I've been having this problem as well. and have been following this and several other forums to look for a solution. I tried uninstalling java and reinstalling using the one on the technicpack.net. I completely deleted .techniclauncher and the exe, then redownloaded. I deleted .minecraft and reinstalled (though encountered null errors...), and finnally completely turned off my Norton AV software and ran it.
Feel free to look at the logs it gave me:
[19:22:40] [sEVERE] ------------------------------------------
[19:22:40] [sEVERE] Launcher is starting....
[19:22:40] [sEVERE] Launcher Build: '1.0.1.3'
[19:22:40] [sEVERE] Allocated 910.25 Mb of RAM
[19:22:40] [sEVERE] Java VM: '1.7.0_04-b22'
[19:22:40] [sEVERE] OS Version: '6.1'
[19:22:40] [sEVERE] Is 64-bit: 'true'
[19:22:41] [sEVERE] [info] Downloading 'mirrors.yml' from 'https://raw.github.com/TechnicPack/Technic/master/mirrors.yml'.
[19:22:41] [sEVERE] Exception in thread "main"
[19:22:41] [sEVERE] java.lang.NullPointerException
[19:22:41] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getAllModPackResources(ModPackListYML.java:186)
[19:22:41] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:363)
[19:22:41] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)
[19:22:41] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)
[22:10:07] [sEVERE] ------------------------------------------
[22:10:07] [sEVERE] Launcher is starting....
[22:10:07] [sEVERE] Launcher Build: '1.0.1.3'
[22:10:07] [sEVERE] Allocated 910.25 Mb of RAM
[22:10:07] [sEVERE] Java VM: '1.7.0_04-b22'
[22:10:07] [sEVERE] OS Version: '6.1'
[22:10:07] [sEVERE] Is 64-bit: 'true'
[22:10:13] [sEVERE] [info] Downloading 'mirrors.yml' from 'https://raw.github.com/TechnicPack/Technic/master/mirrors.yml'.
[22:10:13] [sEVERE] Exception in thread "main"
[22:10:13] [sEVERE] java.lang.NullPointerException
[22:10:13] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getAllModPackResources(ModPackListYML.java:186)
[22:10:13] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:363)
[22:10:13] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)
[22:10:13] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)
[22:10:57] [sEVERE] ------------------------------------------
[22:10:57] [sEVERE] Launcher is starting....
[22:10:57] [sEVERE] Launcher Build: '1.0.1.3'
[22:10:57] [sEVERE] Allocated 910.25 Mb of RAM
[22:10:57] [sEVERE] Java VM: '1.7.0_04-b22'
[22:10:57] [sEVERE] OS Version: '6.1'
[22:10:57] [sEVERE] Is 64-bit: 'true'
[22:10:58] [sEVERE] [info] Downloading 'mirrors.yml' from 'https://raw.github.com/TechnicPack/Technic/master/mirrors.yml'.
[22:10:58] [sEVERE] Exception in thread "main"
[22:10:58] [sEVERE] java.lang.NullPointerException
[22:10:58] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getAllModPackResources(ModPackListYML.java:186)
[22:10:58] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:363)
[22:10:58] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)
[22:10:58] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)