Might be getting somewhere.
here's an example....

Tried to save a pic into a program files folder:


Here's the properties: as you can see it says "full control" for everyone:


however, when I right-click the space then select 'properties' it seems the "user/shawn" doesn't have full permissions. I take it that this is the identity the comp is looking at when I attempt to save something?


Will change this to 'full' then try again.
Nope, won't let me edit the permissions