OpenCL SDK Questions about Terasic DE5 Board？

If your system runs on Windows 7, you might receive the following message during

board driver installation:

difx_install_preinstall_inf: err a, last event 0, last error 0.

ERROR_BAD_ENVIRONMENT

If you receive the above message and the Jungo WinDriver does not appear in the

Windows Device Manager, you must reinstall the Jungo WinDriver by inserting

the -compat option to the wdreg commands in install.bat, as shown below:

wdreg -compat -inf windrvr6.inf install

wdreg -compat -inf acl_boards.inf install

access install.bat at

%ALTERAOCLSDKROOT%\board\terasic\de5net\windows64\driver.