Monitor your Windows System Registry in Real Time
Regmon is a Registry monitoring utility that monitors the registry in real-time. It shows you the applications that are accessing your Registry, the registry values and keys being modified.

Using Regmon
There is no installation required to run this tool. [Download] and copy all the files in a directory and run the Regmon.exe file. Using the filter dialog, you can filter the data that is being shown. For example, if you want to only show HKLM\Software, then press the Filter dialog button [on toolbar] and in the Filter dialog window, type HKLM\Software in Include box. Similarly, to exclude certain type of values and keys from being shown, enter the values in Exclude box in Filter Dialog.
With this tool, you can keep an eye on applications that are accessing your registry in real time and know how your registry is being modified. It not only helps you in situation when your system is affected by spyware and you want to see which applications are making changes to your registry but also when you want to debug your application.
This tool works on Windows 95/98/Me, Windows NT/2000/XP/2003 and Windows 64-bit for x64.
