How do I unlock the system admin user and leave it unlocked? I just installed AutoCad and cannot run it because it says "The directory may be locked by another process or have been set Read Only."

I did install it in the admin account. Actually the computer has four accounts, one for my husband, where I installed it. One for me which also is set to admin, one is called TEST and has nothing in it and one is guest user.

I don't know how AutoCad is interfacing with the account. That is why I am not sure what to do about it. I read other threads in various places and some seemed to point to something having to do with having multiple users. The solutions were not clear. I was hoping someone else had this problem and could tell me what to do. I tried apple support but no help. I have not tried AutoCad yet as I assumed they wont help since this is a free educational version of their product.

No, it does not work in his account. That is the only account I am trying to use it in.