To install the drivers, open a command window and execute the file. Then, reboot your computer.
This issue was fixed in the 4.2i PC CD release.
If the Parallel Cable III Driver appears as "installed" in your fileset.txt file, then the driver was installed. You can check System Properties -> Hardware -> Device Manager -> Ports -> Port Settings to verify that you have "Legacy plug-n-play" enabled, and that "Never use an interrupt" is selected. (Please see (Xilinx Answer 10942) for more information on this.)
We also recommend the use of a bidirectional port setting. (Please see (Xilinx Answer 11505) for more information.)
Another possible way to work around the problem is to manually copy the drivers into the correct directory and set the necessary registry entries.
Using Windows Explorer, browse to your <$xilinx>\bin\nt directory to locate the drivers listed below:
Windows NT or 2000
1. Copy "windrvr.sys" to the <windows system>\drivers directory. 2. Launch "Regedit", and set the following registry entries in the key:
If the machine has both 4.2i ISE and 5.1i Service Pack 2 ISE (or later releases) installed on it, the 4.2i iMPACT version will not be able to communicate with the parallel port after 5.1i Service Pack 2 is installed. (This is due to a driver conflict). This problem does not affect 5.1i Service Pack 2 iMPACT, which will work correctly with both software versions installed on the same machine.
NOTE: The 5.1i iMPACT programming software will accept files that were generated in previous software versions.