Hi everyone. Newby here. I'm a dinosaur, old. I'm not all the computer literate so any answers in very easy to understand English please. I rarely if ever use Excel. Today I was trying to prepare a spreadsheet. I think very basic. I have created a problem. Now, no matter where I hover the curser, even over the "close" X in the top right corner I get the message. "Reference isn't valid." So now I can't close Excel. This in itself isn't all that much of an issue. The spreadsheet I was working on is not important. I don't care if I lose it. I do have another Excel spreadsheet I use to record blood pressure readings and other medical "stuff". With the current situation I can't access this spreadsheet. That is a worry. all suggestions will be very much appreciated... Mal.