Security and email

I started to play cf but forgot my security and email i saved the email and security on my pc but my pc crashed from a RAT i was wondering to change my email to laurentdeleu96@hotmail.com?
if u guys could do that i would be soooooo happy
The reason is it got hacked by my friend and he could get any time any day on my pc so please im asking u can u guys change it or my account will be gone