hi im having the same problem technic will not update to 7.3.4/1.4.2 i have been look on the forms but nothing that works.
Launcher Version: 1.0.1.3
Operating System: Windows XP Pro 32bit
Java Version: Version 7 Update 9
Antivirus Program: AVG but i disabled it for this
i conpleatly uninstalled and reinstalled Technic 6 times so far and so far nothing it will not get past updating jar