Crystal,
I have seen the screenshots you sent – I am not aware that you need any administrator rights to write to the bin folder, the only reason I can think of is perhaps you have your workspace in a protected location.
I have a few questions
1) Where have you created your workspace – what is the path?
2) Is build automatically on? After turning off admin rights, have you tried recompiling your entire workspace?
3) Can you create a simple java project in your existing workspace, add a few dummy classes to it and see if it compiles?
Perhaps the problem is not that you can’t write to the bin folder, but the compilation of a project is failing because it can’t access some resources without Admin privileges; that in turn is chaining into a failure of multiple projects (which won’t compile and there won’t be resources in the bin folder)
4) Can you create a new workspace in a simple location like c:\workspaces\myworkspace and create a test java project with a few classes in it – does that compile?