I have a windows 10 Pro PC Desktop with the NVIDIA GeForce GTX 1660 card installed. I will never know what kept causing the Device Driver Error code 43 from happening as it happened after 2 fresh installations and after 2 restore point rollbacks....and it happened after things worked fine for 1-2 weeks each time ...but then the error code 43 disabled the NVIDIA driver. I used DDU numerous times and reinstalled everything using GeForce Experience and direct download method from NVIDIA website...but nothing worked to get rid of this error code 43 the final time it occurred and I was petrified I would have to do another fresh reinstall on Win 10 Pro or try a restore point...but knew both were doomed because this surely would come back again. Then...lo and behold...Go sent me to my angel Nando4 by having his FIX IT page show up in a Google search...and the Nando4 Script for Error Coe 43 kept me out of the Crypt. Everyone should follow all that Nando4 does post, as he surely knows the most. The bottom line is there is a problem with NVIDIA GeForce GTX 1660 and its current drivers with either Win 10 Pro and its most current update...or...with some unknown application(s) that are installed. Honestly, I'll never know the cause but I do know the fix and that fix is known as Nando4 for sure!!!