If you search for this driver, you will find results. But proceed with caution.
The "Driver Download" ecosystem is infested with malware. Sites that promise a direct download for "COM LPT 17-11" are often "driver bundlers." They wrap a generic, open-source driver inside an executable that installs adware, browser hijackers, or unnecessary "PC Optimizer" tools.
Because the hardware is likely a generic clone, there is no official website to visit. The original manufacturer probably dissolved years ago. Downloading a file claiming to be the "17-11 driver" is a roll of the dice. com lpt 17-11 driver download
If you have a CD labeled "17-11" or "Combo Driver", copy its contents and run Setup.exe in Windows 7 compatibility mode.
If you have a device showing up as "COM LPT 17-11" or similar in your Device Manager, do not search for the name. Instead, use the Hardware ID. This is the digital fingerprint of the device. If you search for this driver, you will find results
Step-by-Step Fix:
You will see values that look like this:
PCI\VEN_9710&DEV_9835&SUBSYS_... If you have a device showing up as
The Universal Workaround:
Once you have the VEN and DEV numbers, plug them into a database like pcidatabase.com.
If the VEN/DEV points to a MosChip/NetMos chipset (very common for COM/LPT cards), you do not need a specific "17-11" driver. You need the MosChip MCS98xx Driver Package.
Ironically, modern Windows (10 and 11) often detects these cards natively. If it isn't working:
Sunix is well known for cards labeled with similar numbering schemes.