what software are you using? SEtool v1.11 or XSv3.1? if you have Setool v1.11, you will find the WdfCoInstaller01005.dll file in the driver folder inside the SETool. when the error pop up, click on browse and then navigate to Setool/driver/x86 folder and select the file WdfCoInstaller01005.dll hope it will solve the problem. using the thanks button is always welcomed.