A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
1
Is this problem only affecting one spreadsheet or all spreadsheets.
Create a new Excel spreadsheet, are you able to enter data in the cells in that spreadsheet and then save the spreadsheet or is there an error indicated, if so, please provide a screenshot of the error.
2
Press Win + Ctrl + O to bring up the on-screen keyboard, and check to ensure the Scroll Lock Key (ScrLk) is not enabled.
3
Double click into a cell or select a cell and press F2 on your keyboard, are you then able to type into that cell.