Getting "error downloading modpack" for all modpacks

[Justin Le]

Ever since the 1.2.7 launcher update, I haven't been able to play on any modpack. I've done everything from deleting everything and re-downloading, and updating java. Please, any advice and help is greatly appreciated.
Here is my (error?) log: http://pastebin.com/nJeWBKda

 

[lavarthan]

Which antivirus program do you have? Try adding the folder, C:\Users\Justin\AppData\Roaming\ftblauncher\, to the exclusion list of your antivirus program. Be sure to check any box that says 'include sub-folders' so it applies to the folders and files below as well.

 

[Justin Le]

My computer actually doesn't have an anti-virus at the moment... so I actually don't know how to do that with out a program.