Q3: I'm running Windows XP and am having problems getting the drivers installed.

A: Windows XP Service Pack 1 comes with our VCP driver as part of the download. 
This uses our default VID (0403) and PID (6001). 
This is because a UK customer got our VCP driver WHQL certified by Microsoft. 
Copies of Windows XP with recent Microsoft updates installed may also include VCP. 

As far as we know there are two possible ways to get around this; 
1) To install D2XX on an XP system with Service Pack 1 installed : 
Make sure that you have a copy of the latest version of D2XX downloaded from our website. 
Unzipped it into a folder somewhere on your c drive, or (preferably) onto a floppy disk. 
1.1) Plug in your USB device and allow it to install VCP by detecting new hardware and
 following the prompts in the add new hardware wizard. 
1.2) Go to the device manager (found in ''control panel'' ''system''). 
Select view devices by connection from the view menu. 
You will find our device listed under 
''BIOS > ACPI > PCI Bus > USB host controller > root hub > > high speed usb to serial converter > USB serial port (com port number)''. 
1.3) Right click the ''USB serial port'' and select ''disable''. 
1.4) Right click ''high speed USB serial converter'' and select ''update''. 
1.5) A wizard for updating the driver should now appear. 
Follow the prompts.
 Choose the option ''Don't search I will select the driver to install''
 then select ''Have disk''. Now point the Wizard to the location of the
 D2XX drivers on your system. 

1.6) D2XX will now install successfully. You can check this by selecting 
''View devices by Type'' from the ''View'' menu in the device manager. 
The com port which was listed in (1.2) should now be gone.