Swapna,
Thank you for the reply and your help.
I tried these UIDs however they did not work. Those windows are just there in the ArcMap.
Just to be more clear, I have attached the screen shots of the windows I want to remove from the ArcMap. Please view them and let me know how can I remove this windows from the ArcMap. Or else, if I could remove the buttons which open these windows, that will also be fine.
I am on ArcGIS 10.2
P.S. Please ignore the third screen shot, i.e. Tools Context Menu.
Thanks once again.
S.