You apparently don't have the NI-DAQ driver installed on the machine where you opened up the example. If you install the latest version of NI-DAQ for your operating system (look here), you will not have any missing subVIs.
I have a list of drivers from the site. I am using windows 98. Which driver should I download? Can I download or "burn" on a CD?
Driver
NI-435x Version 2.1 for Windows 2000/98/NT/XP NI-488.2 (Win32) Version 2.3 for Windows 2000/XP NI-DAQ Version 7.4 for Windows 2000/NT/XP NI-DAQmx Base Version 1.4 for Windows 2000/XP NI ELVIS Version 2.0 for Windows 2000/NT/XP NI ELVIS Version 2.0.1 for Windows 2000/NT/XP
There is no example finder on my help tab. Here are the instructions. I cannot seem to locate the example finder!
Finding Example VIs .
Complete the following steps to browse or search installed example VIs and example VIs on the Web.
Select Help»Find Examples to launch the NI Example Finder. You also can click the arrow on the Open button on the LabVIEW dialog box and select Examples from the shortcut menu to launch the NI Example Finder.
HOW TO DO THIS?
Select Help»Find Examples to launch the NI Example Finder
You want the NI-DAQ 7.4 driver, assuming you're using the 6025E DAQ board you mentioned above. You could burn the driver onto CD if you wanted; you'll see that the downloads actually have "CD1" and "CD2" in their names.
With regard to your question about Example Finder above: you need to choose Help >> Find Examples from LabVIEW itself, not from the Help interface. You can do it from any front panel or block diagram.
Small correction: Assuming you're using the 6025E DAQ board you mentioned above, the latest NI-DAQ driver that supports Windows 98 is NI-DAQ 7.1: http://digital.ni.com/softlib.nsf/websearch/C1F802E457EA042586256DD00001B0C9?opendocument&node=132070_US (537MB download)
I have located FIND EXAMPLE. I went to SEARCH and type PWM. There were no examples! However if I type P, there were a lot of information but no PWM. What shall I do?