Cactus Game Design Message Boards

I changed some settings on my computer last week and added an account.  I thought I changed which account was administrator but I found out yesterday that neither account is set as administrator.  I have tried to change one of them but when the little window pops up to enter the "add/change" account there isn't a place to enter a password as if there were an administrator.

Anyone know how to help me out? 

How would I get to it if I did? (I don't know if I do)

Or just search for hours, give up, and frustratedly smash you head on your keyboard.
A file should come up solving your problem.
This had worked for me in multiple situations.