Once your system boots back up, you should confirm that the Windows kernel recognizes the physical serial and parallel lanes over the PCIe interface. Press Windows Key + X and select . Expand the Ports (COM & LPT) branch.
This guide will walk you through downloading and installing the official drivers to get your COM and LPT ports up and running in minutes. 1. Download the Official WCH CH382L Driver
Download the CH38XDRV.EXE file from the WCH website. Extract/Run: Run the executable file.
This guide provides everything you need to know about the WCH CH382L driver on Windows 10. We will cover what the chip is, why you need the driver, how to install it correctly, and how to fix common issues.
To install the WCH CH382L driver on Windows 10, follow these steps: wch ch382l driver windows 10
The WCH CH382L is a PCI Express to multi-port interface controller. It is the primary chipset on many low-cost expansion cards designed to add legacy ports to modern computers. These cards typically provide:
Two asynchronous serial ports compatible with 16C550 or 16C750 UART standards. Parallel Port: One EPP/ECP bidirectional parallel port.
WCH CH382L Driver for Windows 10: Quick Installation Guide WCH CH382L
If your device is still not functioning correctly after going through this guide, consider posting in relevant tech forums or checking the official WCH support page for more specific advice. Once your system boots back up, you should
Windows 10 enforces strict driver signing. If an older version of the CH382L driver is used, Windows might block it.
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, and point it to the folder where you extracted the official files. 4. Troubleshooting Common Issues CH38XDRV.EXE - Nanjing Qinheng Microelectronics Co., Ltd.
Inside was a setup executable with a pixelated icon. He double-clicked. This guide will walk you through downloading and
The device is showing up as or "PCI Serial Port" ? You are using a desktop or a server ?
He sat back and cracked his knuckles. "Alright," he muttered to the empty shop. "Let's do this."
| Issue | Solution | |--------|----------| | “Driver not signed” | Disable driver signature enforcement (see step 3.1) | | COM port not working | Change COM port number in Device Manager → Port Settings → Advanced | | Device disappears after reboot | Disable Windows 10 fast startup (Power Options → Choose what power buttons do) | | Conflict with USB 3.0 | Try USB 2.0 port (CH382 is USB 2.0 compliant but some USB 3.0 hubs cause issues) |
| Problem | Solution | |---------|----------| | | Use latest driver (v3.8+). Or temporarily disable driver signature enforcement (for testing). | | Code 10 – device cannot start | Uninstall driver → delete C:\Windows\System32\drivers\ch382.sys → reinstall with admin rights. | | Parallel port not detected | Check BIOS → ensure PCIe slot is enabled. Try different slot. | | Installer fails to run | Run as Admin + disable antivirus temporarily. |
Make sure the card is pushed all the way into the computer slot. Error Code 10 or 52 This means Windows does not trust the file signature.