I have x64 Vista with an i7 chip and 6GB RAM. A long time ago I tried Returnil and soon ran into problems with explorer.exe not responding, so I uninstalled Returnil. In October 2012 I decided to try Returnil again, and after some excellent help here in this forum I was able to install Returnil and it ran great. Now, about 3 months later, I'm starting to have the same problems I had before, and in about the same time-frame. Programs are slow to start, programs freeze, explorer.exe stops responding. Instead of uninstalling as last time, I've not used Returnil for a few days, and gradually things have returned to near normal. Is there a reason for this? I'd like to use Returnil for everyday use, but that's not practical if this continues. And if I can only use Returnil occasionally, is there a way to set Returnil to run only when needed, and not all the time?