The IO1874 is a device manufactured by Siig. This update - "4S_UPG.EXE" - has an average rating of 5 out of 5 stars based on 3 reviews, and has been downloaded 16 times. It is compatible with PCs running Windows XP, among other operating systems. The total disk space used for this update is 26.9 KB.
IO1874
Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows NT3.51, Windows ME, Windows 98SE, Windows 98, Windows 95, Mac OSX, Mac OS, Linux, Other Unix, DOS
4S_UPG.EXE (26.9 KB)
PCI Expander 4S 850
PCI 16850 UART two-port serial I/O card upgradable to 4S
Andrews (DG Staff Member) on 11-Sep-2004
To get the IO1874 driver, click the green download button above. After you complete your download, move on to Step 2.
If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Siig IO1874 into the search box above and then submit. In the results, choose the best match for your PC and operating system.
Tech Tip: If you are having trouble deciding which is the right driver, try the Driver Update Utility for Siig IO1874. It is a software utility which automatically finds and downloads the right driver.
Open a tool called Device Manager.
Use Device Manager to put the new driver on your computer.
Turn your computer off.
Turn your computer back on.
Now your new driver is ready!
Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.
For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.