i can work every thing fine but when i try to open tekkit it sits there for a minute or two then says Update Failed! please help! I don't know if this will help but i have a windows 7 64 bit operating system
Try re-downloading the exe if taht doesn't work find your tekkit folder C:\Users\YOUR USERNAME\AppData\Roaming\.techniclauncher\tekkit backup your worlds and make sure you know any server ip's you want to keep delete tekkit folder and then reopen the exe then wait for it to download again.