So I have the Performa 578 in my room, set up with System 7.5.3, upgraded to 7.5.5., Open Transport, etc.. So today I turn it on, it freezes. I restart, and the network does not initialize. I go to set the AppleTalk connection to Ethernet. This also causes the computer to freeze. I restart the computer, this time resetting the PRAM. It boots up, but Open Transport is gone, and has reverted to MacTCP.

How the heck did it do this? What did I do wrong?

To be honest, a lot of weird stuff has been happening with this computer.