1. The article [Q819946] explains a problem and the possible fix, that when you right-click an item (such as a file, a folder, or a network connection) in Windows Explorer or in My Computer, other programs may temporarily stop performing a task. In addition, if you start Windows Task Manager (right-click an empty area on the taskbar, and then click it), you may notice on the Processes tab that the Explorer.exe process is using a lot (or 100 percent) of the CPU resources.
2. This site explains the problems concerning "Right-click is slow or weird behavior caused by context menu handlers" and then you may find the utility "ShellExView v1.01" useful for displaying the details of shell extensions installed and that allows you to easily disable and enable them at will.
Note: The above mentioned utility has no "Help" nor does the download contain a "Readme" file explaining its use. I would suggest that you either copy the file attributes from the site and keep it in your own "readme" file or add the site URl to your "Favorites" for subsequent access as needed.
I am running WinXP-SP2, when I right click on a folder in windows explorer to show the folder properies and share status etc the property dialog fails to show. No error occurs, it just doesn't do anything - like I never even clicked it. If while highlighted a fold I click File / Properties, I get the same result - NOTHING!