It is practically impossible to create a completely secure and invulnerable operating system. Keeping your system secure requires little effort on your part: simply find an antivirus or a privacy application that will run in the background making sure there are no harmful activities hiding from you.
Merlot Crypto Solutions
Data Locker Inc.
Thursby Software Systems, Inc.
Data Security Systems Solutions (DS3)
OVPN Integritet AB