
Start Menu -> Settings (Gear) Icon -> Update & Security -> Troubleshoot -> Additional Troubleshooters Lets see how this utility can be used to troubleshooter the Calculator. Windows Troubleshooter is a built-in utility in Windows 10 that can be used to resolve day-to-day errors experienced within the operating system. When done, recheck if the Windows Calculator is functional now. The command will take a while to execute completely. Open the Command Prompt by typing in cmd in Run.

A quick command can be used to rebuild those files and run the applications smoothly. Often Windows files are corrupted or accidentally deleted, which causes some of the apps to malfunction. Once all the applications have been updated, including Windows Calculator, relaunch the application and check if the error is resolved.

The calculator can be converted into the Scientific mode for more complex calculations, or into Graphical mode to plot graphs from equations. Upon clicking the three bars, you are presented with a list of options to choose from. The Standard indicates that the calculator is currently in Standard mode, which can be changed by clicking on the three bars left of it. You can check the old calculations performed by clicking the clock-like icon on the top-right, or click on the middle button to keep the calculator always on top of other applications. Apart from the basic calculations which can be performed from the keypad, the top bar consists of various features.
