The 3Com 10 100 PCI NIC w 3XP (3CR990 TX 97) is a PCI Ethernet adapter designed for wired network connections at 10 or 100 Mbps. Its driver allows Windows to recognize the card and manage communication with your local network, supporting access to shared resources and internet services when configured correctly.

Key Features

• Wired Ethernet connectivity: Enables the adapter’s basic networking functions for a compatible Windows installation.
• 10/100 Mbps operation: Supports communication with compatible Ethernet switches and routers, with actual transfer speeds depending on network conditions.
• Windows network integration: Makes the adapter available through Windows networking settings for IP configuration and connection management.
• Device identification and troubleshooting: Helps Windows identify the card correctly so you can check its status and investigate connection problems in Device Manager.

How to Install

1. Confirm the hardware model. Open Device Manager and locate the adapter under Network adapters or Other devices. Check its hardware IDs against the driver package information to confirm that it covers the 3CR990 TX 97.

1. Verify operating-system compatibility. Before downloading, check whether the package explicitly supports your version of Windows 11, 10, 8, or 7 and its 32-bit or 64-bit architecture. This is legacy hardware, so a driver for an older Windows release should not be assumed to work on a newer one.

1. Prepare the driver files. Download the matching package and extract it if necessary. If this computer has no working network connection, transfer the files from another computer using a USB drive.

1. Install the driver. Run the included installer, if available. Otherwise, right-click the adapter in Device Manager, select Update driver, and browse to the extracted driver folder. Avoid forcing installation if Windows reports an incompatible driver.

1. Restart and test. Restart if prompted, connect an Ethernet cable, and check that Device Manager shows no warning icon. Test access to your router or a website; if the connection fails, inspect the cable, switch port, and IP settings before reinstalling.

Common Issues and Fixes

• Install fails or is blocked: The 3CR990 TX-97 uses a legacy 3Com/3XP driver. On newer Windows, temporarily disable driver signature enforcement or use Device Manager > Update driver > Browse to the extracted INF. Avoid the old setup.exe if it stalls.
• Device not detected: Reseat the PCI card, try another 32-bit PCI slot, and enable PCI/PnP in BIOS. Check Device Manager under Network adapters and Other devices; no 3Com entry usually means a slot or card fault.
• Version conflicts: Remove existing 3Com NIC/3XP driver entries in Device Manager with hidden devices shown, reboot, then install the exact 3CR990 TX-97 package. Avoid Windows generic drivers and mixed INF versions.