From a different, clean device , change the passwords for your email, banking, and primary social accounts. Enable Multi-Factor Authentication (MFA) everywhere [1, 2]. How to Stay Safe

If you haven't opened it, delete it immediately and empty your trash.

They may install a "backdoor" that allows the attacker to access your computer even after you restart it [2]. Immediate Safety Steps

Be wary of "double extensions" like document.pdf.exe .

If you must test suspicious software, use a virtual machine or a tool like Any.Run to see what the file does in a safe environment.