A hacker is going to wipe my computer.?

Your immediate priority is to act fast. First, disconnect the computer from the internet completely. Unplug the network cable or switch off your Wi-Fi. This action cuts the hacker's access at once. Do not connect any backup drives for now.

Using a separate, safe device like your phone, you must change all your critical passwords. Start with your primary email, followed by banking and other sensitive accounts. Your machine is compromised and cannot be trusted. The only truly safe path forward is to wipe the hard drive entirely and perform a fresh installation of the operating system. It is a serious step, but it is essential for securing your digital life again. This is the only way to be certain.