Whenever an application is installed it makes certain changes in the registry and it is difficult to detect which registries were affected with that.
So to ensure the registry changed we have a tool called RegFromApp that can monitor the registry changes made by the application. RegFromApp monitors the Registry changes made by the application that you selected, and creates a standard RegEdit registration file (.reg) that contains all the Registry changes made by the application. You can use the generated .reg file to import these changes with RegEdit when it’s needed.
The tool is simple to use and require no installation. To be able to use it, what you need to do is just select the process that you want to inspect, and click Ok. After clicking Ok, each time that the selected process writes a value into the Registry, the main window of RegFromApp will display the written value in Windows .reg file format.
You can copy & paste the desired values to another Registry file, or alternatively, you can save the entire Registry changes into a .reg file by using the ‘Save As’ option.