I thought I could post my solution here.
First, make sure that hidden folders are showing. Go to the folder Appdata (Inside your name folder)> Roaming > .technic > tekkit > mods. Get rid of the folder titled ComputerCraft (not the zipped one titled ComputerCraft1.41). I looked on my friend's computer, which runs tekkit fine, and that folder was not there. Next, when I logged on, I did not crash.
Hope this helps!