What have you noticed on your computer that suggests that is might be compromised? Yes, it is possible to run l Lubuntu right from a thumb drive. It will not save files eliminating all user made configurations. It sounds like your navi-system us satellite based. Is this accurate? <div class="gmail_quote">On Feb 28, 2015 12:57 PM, "Douglas Pollard" <<a href="mailto:dougpol2@gmail.com">dougpol2@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi all, I am using Lubuntu ( Navigatrix) on a computer to navigate a sailboat with. At the present time I have a laptop for navigation that I do not use on line and I have one that I use on line. I am afraid that my navigation computer might be compromised and cause me to run up on top a coral reef. Home file is incripted. I am being told that IF I use the program running off a thumb drive that it will be safe from compromise because it can't be written to? What do you guys think about this does it make sense. Doug -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com" target="_blank">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>