Ugh, why am I even telling you this? Mint 17 doesn’t get security updates since 2 years or so, and security updates for 18 will stop this month. So, really now … it’s high time for you to update your system to 20.1
FFS, don’t be such a lazy slob! 😐
Here’s a (German) how-to video for you:
Got it? Wasn’t to hard, no?