What should I do if I suspect my computer has a Remote Access Trojan?

Definitely keep your infected PC offline. While you can't access your files directly from the infected system, it's important to wipe all partitions and reinstall the operating system to be safe. For critical files, try booting from a USB drive and see if you can back up your important projects, but be very cautious—there's a chance the RAT could spread through your backup.

If you think you've got a RAT, first off, avoid connecting to the internet. Change all your passwords on a different, secure device. It's good practice to assume anything stored on your machine is compromised, so consider resetting passwords for sensitive accounts, especially banking ones. You might want to check out the wiki guide for removal instructions. If it's a rootkit, using Malwarebytes' Rootkit Cleaner is crucial before you do a complete reinstall of your OS.

Just to clarify, yes, RAT stands for Remote Access Trojan. It's a type of malware that allows someone to control your computer remotely without your knowledge. So definitely take this seriously!