A flicker of red text. A command prompt window that flashed for half a second. Or worse—a warning from Windows SmartScreen saying, “Windows protected your PC from an unrecognized app.”
Stay safe. Stay skeptical. And for the love of all that is holy, read the checksum. psa interface checker scary mistake download
When in doubt, use a live USB with a Linux distro to run the checker. If it bricks something, it bricks a disposable environment—not your main machine. A flicker of red text
If you were in the middle of downloading or running a (often used for debugging serial ports, audio interfaces, or proprietary hardware handshakes), your heart probably just dropped. read the checksum. When in doubt