Ucom 704 Driver Download Free < 10000+ POPULAR >
Before diving into the download, it’s crucial to understand what you’re working with. The UCOM 704 is most commonly identified as a USB 2.0 to Serial (RS-232) Adapter Cable. UCOM (Universal Communication) was a popular brand in the early-to-mid 2000s, producing connectivity hardware for networking and legacy industrial equipment.
Common Uses of the UCOM 704:
The internal chipset is typically a Prolific PL-2303 or, in rarer cases, an FTDI chip. This matters because the driver you need depends entirely on that chipset. ucom 704 driver download free
Meta Description: Need the UCOM 704 driver download free? This guide provides safe links, step-by-step installation for Windows 10/11, and fixes for common COM port errors.
Prolific’s Windows 10/11 drivers actively block counterfeit chips. To check your adapter: Before diving into the download, it’s crucial to
If you have a counterfeit: Your only option for a ucom 704 driver download free is an older Prolific driver (v3.3.2.25 for Windows 7 compatibility mode) or switching to a different chipset like FTDI or CH340.
Even with the right file, problems occur. Here are the top 5 fixes. The internal chipset is typically a Prolific PL-2303
| Problem | Likely Cause | Free Solution | | :--- | :--- | :--- | | Code 10 (Device cannot start) | Counterfeit chip + new driver | Uninstall modern driver; install legacy v3.3.2.102. | | Code 28 (Driver not installed) | Missing INF file | Use the "Have Disk" method in Device Manager. | | Device disconnects randomly | USB power saving | Go to Device Manager → USB Root Hub → Properties → Power Management → Uncheck "Allow computer to turn off." | | COM port number too high (>COM8) | Legacy software limitation | Device Manager → Port Settings → Advanced → Change COM port number to COM2, COM3, or COM4. | | Works on USB 2.0, not USB 3.0 | Driver compatibility | Force the cable to use a USB 2.0 port (black plastic tab inside, not blue). |