Hi,microsoft community

                                          actually my laptop is lenovo and it has OS of 8.1 may be not genuine version, it worked properly till this problem has occured .Now the problem is that store and pc settings in windows is not opening ,ms office 2010 is not working and i cannot update my windows , i hav tried some suggestions by seeing in internet but they didnt worked.plz help me regarding this problem  how will my laptop comes to its previous stage