i get to my windows 7 calculator by clicking on the round windows thind bottom left corner of screen and then type calculator in the start search bar, it then brings up a list of things and the calculator itself is the top one, click it and it appears . it is ok but shuts down everytime you try to then type your answer into a doccument, so a good memory or pen and paper to write the answers on is advisable! I bought a large desk calculator in the cheap shop for £1 which works very well, so you don't havveto spend much to get a decent one unless you need advanced calculations like pi