This will be my last question for awhile, I promise. Ok so I decided to revert my quadra to 7.6.1. The installation was a success, but the computer fails to boot unless I hold shift to disable extensions at boot up. Otherwise, it spends a long time on the start up screen, and then proceeds to freeze on a "rebuilding Macintosh HD" screen until I am forced to reboot it. I am pretty sure this means I am having an extension causing troubles for me. When I installed the system, I ticked a few extra things that I probably shouldn't of and that may have installed some extensions that aren't good for my quadra 610. i just want to know which extensions(s) you think may be causing this problem. I included a screenshot of the many extensions that are in my folder. Thank you.