I just bought a new PC and today I can’t access any of the files or programs installed on it. A lockscreen pop up screen with threats to delete my data appears on my PC every time I boot it… I’m pretty sure it’s the Atom virus! I really need to access my data, so can you help me remove Atom from my PC? Thank you for your help in advance

p.s.: will I be able to access my files after the Atom removal?