You can check what National Instruments software is installed on your
system in two places. In Measurement & Automation Explorer,
under 'My System', expand the 'Software' section. This will show
all National Instruments software, including drivers, installed on your
computer. For the NI PCI 6221, you will need the NI-DAQmx driver
installed. You can also verify the installation of any National
Instruments software through the Add/Remove Programs menu of the
Control Panel. In the list of programs installed on your
computer, find the entry for National Instruments Software and select
'Change'. This will show you a dialog box listing all of the
National Instruments software on your computer and allow you to repair
an installation or completely remove a piece of software from your
computer. Note: Some of the control panel menus might look
slightly different depending on your Operating System.
When you have ensured that the NI-DAQmx driver is installed on your
system, all you need need to do is power down your computer, install
the NI PCI 6221 in a PCI slot of your computer, and restart your
computer. Windows will automatically detect the new hardware and
start the New Hardware Wizard. In Windows XP, usually the Wizard
first asks to connect to the internet to find the driver for the
device. Select 'No, Not at this time.' Then, allow the
wizard to install the driver automatically for the device, and you
should be good to go.
If you have any more specific questions or problems, reply to this post and hopefully we can help you get up and running.