Most CH340 driver installers are packaged as a single executable ( setup.exe ) that detects your architecture automatically, but if you are downloading a ZIP file containing separate folders, choose the one matching your system type.
You will see a list showing "USB-SERIAL CH340" or "WCH CH340 USB to Serial." Select it and click "Next." If you see a warning about "This driver has not been digitally signed," ignore it and choose (this option only appears on 32-bit XP). ch340 driver windows xp
Usually a memory conflict or a corrupt driver from a bad download. Most CH340 driver installers are packaged as a
