I replaced my touch screen with cheap Samsung from eBay that flickered on my SP4. I got a refund and put in an LG screen that was designed for SP5. All seems to be working so far but I noticed the device manager shows twice as much stuff (in my opinion) as it should. Is this potentially a problem? I do not know which ones to delete.
 I deleted all duplicates and to be sure I removed "all" not just the duplicate. They all came back when I rebooted.