OS drivers for serial card

try here driverpacks.net/downloads

Did you get the drivers you were after?

If you still can't find them, I go to the device manager, properties page for the problem device, Details tab, then the "Hardware Ids" in the dropdown. Google the VEN_### and DEV_### and you should find the device name so you can grab drivers from the manufacturer. Sometimes you'll even find the drivers directly, but as always be careful what you install with this method or the above.

I use DriverIdentifier - The most simple & easy driver updating tool.. Probably you will be forced to register but it's free when you select "please give it to me for free" or something like that. Or just google PCI\VEN ID.

Ouch... I didn't realise that this thread is almost a year old. Sorry for digging but I'm unable to delete the post now.