ShellExView

ShellExView is an application designed to help you access the details of shell extensions installed on your system, offering a few other extra tools to help you manage them.
With a minimal and clean interface, ShellExView also helps you disable certain Context Menu Handlers and thus prevent crashes from taking place on your computer.
When launched for the first time, the application automatically scans the system and displays all shell extensions, alongside valuable information such as type, description, version, product name, company, file name, file extensions, file attributes and size.
If you're looking for more control options, it's enough to right click any entry and choose from the available tools, including disable or enable selected items, open CLSID in RegEdit, save or copy selected items, perform a search on Google using the file name or the extension name or simply access its properties.
The “Properties” window shows exactly the same details as the main window, only that they're now presented in a better organized screen.
Another good thing about ShellExView is the fact you don't even need to install the program, as all its files are packed in an archive and thus no prior installation is needed.
ShellExView works with just a minimum amount of computer resources and seems to get along very well with all Windows versions, but keep in mind that Windows 7 users need administrator privileges to make changes to context menu handlers.
Overall, ShellExView is one of the best tools of its kind and it is not only freeware, but it's also extremely easy to use and relies on a very clean interface.

ShellExView Video Guide