I have 3 Windows Server 2008 Standard virtual servers on Hyper-V. On 2 of them when I right click the Start menu I get the standard selections: Open, Explore, etc. but on the other I get the same menu you get when you right click the task bar: Toolbars, Task Manager, etc. I cannot figure out how this was changed or how to return it to normal.
If you want to clean it up, you can use ShellExView
Ideally, you would want to know where it came from... (the properties might contain details from where it originated from).