Open the access panels and or paper scraps. Wait 60 seconds to clear the internal memory.
Three flashes indicate a "no paper" error. Load paper into the rear tray, then press the once. The printer will re-feed. epson m100 reset button
Most "Adjustment Programs" are flagged as threats by Windows Defender. You must temporarily disable protection to use them. If you want more help, let me know: What error message or light pattern are you seeing? Open the access panels and or paper scraps