The following process will ensure all residual files are properly removed as well. Use the following procedure to uninstall Revit products and remove any remnants from your system. The result is a clean system on which you can reinstall. Note that all paths listed by default are for Revit Substitute the product name below based on the Revit product you are uninstalling: Be sure to back up any custom family or template files prior to following this procedure.
Log on as a Local System Administrator and disable any Antivirus programs. Remove the specific Revit product from the Windows Control Panel: Use Windows Explorer to locate and delete the following folders as appropriate: Locate and delete the following registry keys as appropriate: Problems caused by improperly editing the Windows registry could render your computer operating system unusable. Microsoft provides a wealth of critical information that you need to know about the registry in the Microsoft Knowledge Base at http: Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.
Before reinstalling Revit products 1. Use the End Task feature to end any anti-virus programs. Disabling anti-virus programs from the system tray may not be sufficient. Several anti-virus programs can be disabled by right-clicking the taskbar icon and selecting Disable from the shortcut menu.
For more information about disabling your anti-virus software, refer to the vendor of that software. It is important that you not only disable the anti-virus software but also use the End Task feature to end the anti-virus software.
Click Task Manager. On the Processes tab of the Task Manager, select the process for the anti-virus program and then click End Process. You are now ready to install Revit products on the clean system.
If after following the above steps, the Revit product still reports as being installed, please view the Technical Solution: See Also:
From the outset, Revit was intended to allow architects and other building professionals to design and document a building by creating a parametric three-dimensional model that included both the geometry and non-geometric design and construction information, which is also known as Building Information Modeling or BIM Eastman C. At the time, several other software packages—such as ArchiCAD and Reflex—provided a three-dimensional virtual building model, and let the user control individual components via parameters parametric components. Two key differences in Revit were that users created parametric components in a graphical "family editor" rather than a programming language, and the model captured all relationships between components, views, and annotations so that a change to any element automatically propagated to keep the model consistent. The concept of bi-directional associativity  between components, views, and annotations was a distinguishing feature of Revit for many releases. The ease of making changes inspired the name Revit, a contraction of Revise-Instantly. At the heart of Revit is a parametric change propagation engine that relied on a new technology, context-driven parametrics, that was more scalable than the variational and history-driven parametrics used in mechanical CAD software. The company was renamed Revit Technology Corporation in January Revit version 1. The software progressed rapidly, with version 2. Licensing was controlled by an entirely automatic process, an innovation at a time when human intervention and manual transmission of authorization codes was required to buy other types of design software.