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Can I request this be in a sticky somewhere? This error is caused by another program not allowing minecraft to access the file, loginTimes.dat It is often times your antivirus program that is the culprit. Add the FTB folder to the exceptions list of your antivirus program. From your log the exact folder you wish to use is your Desktop which I would not advise as that would mean every file on your desktop would not be scanned. Please put the mod pack folder into a folder named FTB and change the 'Install folder...' in the launcher to read 'C:\Users\Justin Loraine\Desktop\FTB' Restart the launcher to have the change of folder take affect. Now add the folder 'C:\Users\Justin Loraine\Desktop\FTB\' to the exceptions list of your antivirus program. Be sure to check any boxes that say 'include sub-folders'