I've had this happen, as well--once or twice. My solution was simply to clean install the newer driver you want to install--this should uninstall the partial driver correctly and then install the correct driver. Weirdly, you may find that you have to do back-to-back clean installs to correct the problem--as a single clean install may not suffice. Or, you could try uninstalling the partial first via programs and features--rebooting and then installing the driver you want--but really, clean install automates that process for you. Or you can use DDU, if you want, as elstaci suggests. Or, you could boot into safe mode and uninstall manually, reboot and then reinstall the desired driver.
The approach I found that doesn't work at all, is to simply try to force install the newer drivers on top of the partial install, IIRC. You would think this should be sufficient to rectify a partial install--but it isn't, for some reason. The error will simply repeat--at least, I recall it happening to me that way. Please pardon me if my memory here is hazy, it's been awhile since this happened--I do recall the experience as somewhat annoying, however, so I can sympathize with those who also have the problem. Wish I knew why it happened at all--my only theory is that it results after x number of forced driver installs on top of each other--no clean installs, etc. Have no idea if that is the case, but these days if I want to be "sure" when I install a driver I go the clean install route. Also, if you have Win10 Pro, you'll want to set a policy of not receiving device-driver installs with your Win10 updates from Microsoft, because Microsoft only installs the minimum driver and you may therefore wind up with *mixed* driver files being active--that can definitely cause problems. Best to simply download and install only from the AMD site, imo.
