hacked

Parallel is being used despite my efforts to thwart to breach my Mac. despite password changes etc. major backdoor intrusion through java future instances to name one of many discovered

I've not used parallels for a good few years as I sold my MacBook. I've just received an email saying my account was signed in from an unrecognised web browser in Italy (I live in the UK). I've changed my password but is there anything else i need to worry about? I'm a little concerned, just...