The changes to the registry which Xilinx makes do not manifest themselves as a problem until the user is required to reboot the system.
At the time of reboot, a network login script may look for and try to execute system level NT commands. The registry changes made by the Xilinx software create a situation where the network login script is unable to find the NT system level commands. This in turn results in a failure of Intel login scripts which would in turn prevent the system from rebooting when a reboot was needed.
"REG_EXPAND_SZ" is the field type. Xilinx's installation changes it to "REG_SZ".
1. Manual method available today: Immediately following the installation of the Xilinx software, and before rebooting, please follow the procedure below:
Right Click on "My Computer" Select <Properties> Select the <Environment> Tab Find the "Path" variable in the "System Variables:" box Double Click the Path Variable displayed in the "System Variables" box Click on the data in the "Value:" box at the bottom of the window (Simply clicking on this data will enable the "Set" button at the bottom of the screen) Click on the "Set" button Click "OK"
2. Xilinx plans to address this issue it its install process: A bug has been filed in Xilinx's Change Request system.