Sorry to hear this.
I have heard quite a few strange behaviours with regards to R9 series cards in combination with AMD Drivers after 16.8.3. It seems that from 16.12.2 onwards most issues are relatively well under control again.
Please make a new clean driver installation by, certainly when using update feature for updating driver old files can/will remain in the registry of windows and those can be “in the way”. Pleas do this:
I think Driver version 16.8.3 is overall working very well for R9 series. I know AMD made many driver updates after that, however all aimed at RX400 series and non that I know of for R7/9 200/300 Series. I do hear end-users with R7/9 200/300 series Cards reporting that 16.12.2 (or later) also works quite decent for them. Did not test that myself yet.
Please uninstall the current Graphics driver and all related Graphics software like Afterburner/GPU-Z or whatever graphics related software you might have installed. Best way to remove Driver Software is to boot Windows in Safe mode, so the registry can also be cleaned. When you system does not allow you to do that, you can also use a program like DDU to remove such software: http://www.wagnardmobile.com/DDU/
Reboot and manually download and install 16.8.3 graphics driver (don’t let auto installer from Windows do that) You can find here:
a newer version if you prefer … (but please do not use any driver from 16.9.1 ~ 16.12.1); here you can find listing of drivers …