Hi Shailesh Mark,
I suppose that you are experiencing the "long file path" issue. Windows imposes a limitation on the maximum length of a path - 260 symbols. The CAB Kit generates a directory structure consisting of many long folder names. The length of the names of the folders, combined with the length of the names of the folders preceding the location where you have it installed, probably end up exceeding the limit.
Try extracting the .zip file in a place with a shorter path (for example C:\).
Hope that helps.
the Telerik team