how do I save a script when access is denied?

The immediate advice would be to just select all and paste into Notepad/other text editor. Presumably you've already tried right clicking on the folders and un-ticking the read-only option

When creating anything new with Unity, immediately after creating the project and a scene, save it all.

Log files are located...

http://docs.unity3d.com/$$anonymous$$anual/LogFiles.html

In some cases, it might not be Unity which is the cause; see also:

http://answers.unity3d.com/questions/599325/giving-me-a-systemunauthorizedaccessexception-ever.html

Ok, after deactivating my virus protection and removing the requirement for permissions I am still having a problem saving my script. In Unity it is saying "internal compiler error" but still in mono it is saying that it doesn't have access. I have even ran both in ad$$anonymous$$istration mode and still not helping.

I am still running into this same problem after multiple solution look ups. none have worked. someone please help. Not sure if this will help but in monodevelop when I try to save this is the error it gives.

 System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.UnauthorizedAccessException: Access to the path 'C:\Users\$$anonymous$$ackenzie\Desktop\Space Shooter\Assets\Scripts\.#PlayerController.cs' is denied.
 
    at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
 
    at System.IO.FileStream.Init(String path, File$$anonymous$$ode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
 
    at System.IO.FileStream..ctor(String path, File$$anonymous$$ode mode, FileAccess access, FileShare share)
 
    at $$anonymous$$ono.TextEditor.Utils.TextFileUtility.WriteText(String fileName, String text, Encoding encoding, Boolean hadBom)
 
    at $$anonymous$$onoDevelop.SourceEditor.SourceEditorView.Save(String fileName, Encoding encoding)
 
    at $$anonymous$$onoDevelop.SourceEditor.SourceEditorView.Save(String fileName)
 
    at $$anonymous$$onoDevelop.Ide.Gui.Document.Save()
 
    at $$anonymous$$onoDevelop.Ide.Gui.ViewCommandHandlers.OnSaveFile()
 
    --- End of inner exception stack trace ---
 
    at System.Runtime$$anonymous$$ethodHandle.Invoke$$anonymous$$ethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
 
    at System.Reflection.Runtime$$anonymous$$ethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
 
    at System.Reflection.Runtime$$anonymous$$ethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 
    at System.Reflection.$$anonymous$$ethodBase.Invoke(Object obj, Object[] parameters)
 
    at $$anonymous$$onoDevelop.Components.Commands.CommandHandlerInfo.Run(Object cmdTarget, Command cmd)
 
    at $$anonymous$$onoDevelop.Components.Commands.Command$$anonymous$$anager.<>c__DisplayClassb.<DispatchCommand>b__2()
 
    at $$anonymous$$onoDevelop.Components.Commands.Command$$anonymous$$anager.DispatchCommand(Object commandId, Object dataItem, Object initialTarget, CommandSource source)