The transaction was not reversed.

The first transaction you linked to (https://www.blockchain.com/btc/tx/fcf291bcc97acffd579df55321dcc999e8ca4f974ac17178df09026767a76a18) is confirmed. 0.1 BTC was transferred to your address 14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG. However, around an hour later, the second transaction you linked to (https://www.blockchain.com/btc/tx/395c3049b349a1ad991d7bd29ad5512f208acfb3375ba4a42a03a9d9caa73292) was made which took that 0.1 BTC plus a number of other very small inputs and sent them all out to 12hXXnMgeQKsb77N89j1eQWDAMz69JHdiu.

No, you can't. You can never be sure that you haven't been hacked. Your computer could have any number of potential malware on it, or you could have typed your details in to a phishing site, or an attack could have reset your password via your email, or 100 other possibilities. If 14rAgGLf5aLn61yavc1eiNkuZKusy5bVLG is your address, then someone has had access to your account to transfer all the funds out of it.