Previously, i have talked about how to install DotNetNuke 5.0 to your hosting account. What if you are using an old release of DotNetNuke? You must upgrade your existing websites to newest release. According to security bulletins out there, old releases have issues with security roles. An attacker could access to your site and gain access to private roles. This is a security hole and an important issue. The solution is upgrading your DotNetNuke Installation. With this tutorial, you will have no hesitation during an upgrade process.