Doesnt get any easier than this. Install any of the iPacks with a simple click of the mouse. And if you decide you dont like that one, just uninstall via Control Panel/Uninstall Programs, then install another til you find the iPack you like for your system. These survive Windows Update and Cumulative Updates as well without resetting to default. Download Link: https://drive.google.com/open?id=1pAWtpgL5XcdEacoL13UDq4amRnsXr5iQ
FYI, these are listed as Windows 10 iPack Theme Collection. (You'll need to register to view/download) I've confirmed that they do install okay on Windows 8.1 too. It's a little tricky to uninstall though. Recommend doing a separate System Restore Point before installing them -- the setup offers doing a restore point, but I'm not sure it worked correctly. Then after uninstalling use "ExplorerIconRefresh.exe". I do wish there was more of a preview of the icons' themes than just the File Explorer and Task Manager ones. Some of the other icons in the set look really nice.
I used the HUD Red one in the past, was my favorite icon pack (I used it when I used Airlock Premium v2.5 for a year or two)
I have it up on my server.... along with a lot of other useful tools... http://mythology.theworkpc.com/index.html
