Microsoft Digital Signature: In Windows 98, ME, 2000 and XP operating systems, Microsoft searches for a digital signature when you install any new hardware. If you have a pop-up window stating "Digital Signature Not Found" simply click the YES/Continue Anyway button to continue installation. If you have a request for a '<modelname>.cat' file choose to skip it; this file is for the digital signature and is not used. We submit all eligible products to Microsoft for certification but the turnaround time is subject to many factors. Not having a digital signature does not affect product performance in any way.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.