- Take any computer you have lying around, even your normal workstation. You may find it easier to use an older computer that has no wifi or bluetooth if you're particularly paranoid
- Create a Linux or Windows bootable disk, and make sure you have the Monero binaries on the same disk or on a second disk (for Linux make sure you have also downloaded copies of the dependencies you will need, libboost1.55 and miniupnpc for instance)
- Disconnect the network and/or Internet cables from your computer, physically remove the wifi card or switch the wifi/bluetooth off on a laptop if possible
The account you've created was created in RAM, and the digital files are now inaccessible. If some adversary manages to somehow obtain the data, they will lack the long password to open it. If you need to receive payments, you have your public address, and you have the view key if needed. If you need access to it, you have your 25 word @mnemonic-seed, and you can now write out several copies of it, including an offsite copy (e.g. a bank deposit box).
