depending on where you got the adaptor, you may need to go on the 
manufacturer's website.  I am using Windows 7.  I recently bought two more 
Gigaware (Radio Shack) USB-to-Serial converters.  They came with CD's which 
included drivers.  There was no Windows 7 driver, but the Vista driver 
worked.  This week, when Windows updates came in, I found that there was 
also an update to my Gigaware drivers.

Once you think you have your drivers installed,go to Device Manager and see 
what COM port number was assigned to the adaptor.  If it is not compatible 
with your software, you can change it.  Know what it is before attempting to 
connect to the radio.

-----Original Message----- 
From: Russell Schermer
Sent: Saturday, September 15, 2012 4:53 PM
To: [log in to unmask]
Subject: Using the TS-2000 from usb

I got my USB to serial converter and connected the rig to the computer, but
I was unsuccessful installing the driver. When I opened the software for the
ts2000 and tried different ports I got an error message that the ports were
invalid. Are there drivers on the Kenwood site for windows 7, or is there
something I need to do to make the rig and computer talk to each other.
Thanks in advance.