Why do I get "Error: Cannot open WinDriver device" when running the APEX 20KE device peripheral component interconnect (PCI) development kit application? - Why do I get "Error: Cannot open WinDriver device" when running the APEX 20KE device peripheral component interconnect (PCI) development kit application? Description This error occurs if the PCI development kit application is looking for the following driver files in the wrong location: windrvr.sys wdpnp.sys These two files should be located in the < Windows installation directory > \system32\drivers directory. If they are not, copy the files into this directory to fix the problem. Custom Fields values: ['novalue'] Troubleshooting novalue False ['PCI'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']