But none of that will do anything at all to erase 12 years of posting on FR without any of those protections. And nothing at all will protect you if JR is served with a warrant for personal info on a given account. :-)
I agree about the encryption. Not sure why you would have your OS on a flash drive if it is already secure, except for backup.
Another important aspect of securing your computer is to NEVER download browser toolbars. They literally infect your whole OS and constantly transmit info to Google or whose-ever toolbar you download.
For example, a recent Flash update automatically downloaded Google toolbar onto my OS without asking for my consent or notifying me. I opened the networking task manager and it was a steady stream of information being sent out - I had to turn off my internet connection until I removed it from my OS. It literally took half an hour for me to remove everything it placed throughout my OS using Revo Uninstaller and Registry Healer. What a bunch of pricks...
(Incidentally, Google and the Obama administration are tight, so expect your info to be going to the government.)