Where are all drivers installed?

I did not write all the vidpid information of default, bulkloop, and streamer to cyusb. in the INF file, I change cyusb every time I write Ram. INF file once, and then install the driver once. I thought windows would understand that the drivers installed three times before and after are cyusb. sys, and the corresponding files are all cyusb. INF, so when the new driver is installed, the old cyusb. sys and cyusb. replace INF.

When I searched for the sys and inf I installed earlier under C: \ windows \ system32 \ drivers and under c: \ windows \ inf, I easily found cyusb. sys (although the file name is capitalized, the MD5 value and cyusb provided by suite. sys is the same), but I cannot find cyusb. INF file.

I found this information in the Device Manager Details (1), so I found a lot of oemx in c: \ windows \ INF. INF files, from oem0 to oem41, and oem39, 40, and 41 are the INF files installed in the USB experiment today, with the same content.

It seems that during driver installation, Windows renamed the INF file to oemx and saved it to C: \ WINDOWS \ INF. The sys file was renamed and saved in C: \ windows \ system32 \ drivers.

Figure 1