I tried exactly this one, after that installed 15.12: claymore 11.0 worked 11.1 not. Tryed to update to 16.12 -> update was partially successful, the AMD software was on 16.12 but the driver version still 15.12.
If the update was partially successful then the drivers are there and installed...how many GPU's are you using? Use GPU-Z, which version does it show there?
It's my gaming PC there is only one 380X in it, GPU-Z shows 15.12.
I'm using for my 7990 Crimson 16.11.5. I tried also Crimson Live edition but it was not working, so maybe for your 380x it's better 16.11.5. Use DDU and then just install 16.11.5 and see how it's going...
Everything was OK on 16.12, this problems occured after updating to 17.1.1, and now it doesn't matter what driver I install, sgminer and zec miner 11.1 refuse to work, but 11.0 is working regardless to the driver I install.