Installing and Updating PCI Serial Port Driver on Windows 10 HP
If this driver is missing, Windows Update often fails to find it automatically because it identifies the hardware by a generic "Unknown Device" ID rather than the specific HP hardware ID.
Here is how to fix it:
This issue is notoriously common on HP Z-series workstations (Z420, Z620, Z820, Z440, etc.). These machines use high-end Intel chipsets intended for enterprise management.
| Feature | Description | | :--- | :--- | | | Full support for legacy and modern HP PCI serial port controllers (e.g., Intel 7 Series/C216, Sunrise Point-LP, Wildcat Point-LP). | | Plug and Play Detection | Automatic detection and installation upon connecting a PCIe-based serial port card or HP motherboard-integrated serial header. | | Legacy Resource Management | Correctly allocates IRQ, I/O address ranges, and DMA channels without conflicting with other devices. | | Power Management | Supports Windows 10 sleep states (S3), hibernation (S4), and fast startup. | | Multi-Port Support | Handles up to 4 serial ports per PCI slot (e.g., for HP dual/quad serial port option cards). | pci serial port driver windows 10 hp
| Feature | Description | | :--- | :--- | | | Compatible with Hyper-V, Device Guard, and Credential Guard enabled. | | No Persistent Unencrypted Data | Driver does not cache or log serial data to disk. | | Standard Windows Security Model | COM port access controlled by standard user/administrator ACLs. | | FIPS 140-2 Compliance | Optional mode for government/medical environments (no weak cryptography used). |
The most reliable way to find the correct driver for your specific model is through official HP channels. Installing and Updating PCI Serial Port Driver on
If you have downloaded a driver file (often in .exe or .zip format), you can manually point Windows to it. Solved: PCI serial port windows 10 upgrade - HP Community