O.K. I assume you have opened the Programs and Features window. In the lefthand sidebar there is an option to: 'Turn windows features on or off'. Click on this and another smaller window will open. This is the Windows Features window. You will probably have to wait a short time while this window is populated then, by ticking/unticking the selection boxes, turn on or off the applications listed.
Thanks for reply and appologies for not anwering sooner. I have tried your suggestions but no luck. I find that the delete function works on recently added software but not on the older programs. Have you any further ideas please
Agree with Pineman100 and Sea Urchin. It would seem that you want to uninstall (delete) a program as opposed to disabling a windows applet. Therefore follow the advice of Pineman 100, Revo Uninstaller is a very competent program, and it's free!