All about application delivery

on our road show a customer asked me, if App-V can totally isolate the application from the operating system, so it cannot pollute th OS. I believe this is not possible because App-V only redirects files that were used during sequencing or were manually added to the virtual file system. So for example if C:\windows\SOMEAPP.INI was not created during sequencing it will later not be redirected into the bubble but the applciation tries to write to C:\Windows…
App-V is not designed to solve security problems, but if can help to mitigate them.