If you think your account has been hacked go to https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=13&ct=1511811808&rver=6.7.6643.0&wp=MBI_SSL&wreply=https:%2f%2faccount.microsoft.com%2fauth%2fcomplete-signin%3fru%3dhttps%253a%252f%252faccount.microsoft.com%252f%253frefd%253daccount.microsoft.com%2526destrt%253dhome-index%2526refp%253dsignedout-index&lc=1033&id=292666&lw=1&fl=easi2&pcexp=true&uictx=me type in your email and password, if your password fails and you are sure you are typing in your password correctly, hit forgot password and select I think someone else is using my microsoft account.