This looks out of place - Flypool lost my miner for 90 minutes.  During that time, a DevFee share acceptance message appeared on my screen.

10:09 PM - Share accepted
10:10 PM - last contact with flypool.org - received email from them saying they lost contact with miner.
10:27 PM - GPU0 DevFee Accepted share
11:25 PM - Control-C on the application and it comes back to life - INFO: Connection restored to flypool.org
11:30 PM - Share accepted

Running 0.3.4b on Windows 10

Spent several hours trying all the following:

• Reinstall all drivers (after removal using DDU Safemode
• Reinstalling windows 7
• Reinstalling 17.7.1
• Update with beta driver from robinh00d
• Rearranged my two GPUs to different PCI-e slots on the motherboard

Interestingly enough, the order of the graphics cards do make a difference.  Windows was not initializing them correctly, then I moved the riser'ed GPU to the other sideo of my GPU plugged directly on the motherboard.  Windows would boot, but get black screen after Windows logo appeared.

As of now, I am sticking with the beta driver (yeah I know) and happy to have AB working for 26.4 and 29.4 mh/s on my RX 480 cards.

Turn off Afterburner's setting to apply overclocks at startup.  You'll be in default settings on next reboot, then re-tune

Claymore failed for me.

Was on 1.7.1 official (@25.1 Mhs), used DDU to remove, installed Robinh00d, worked great and got 2Mh/s better.
Tried this driver - used DDU in safe mode, install Mining driver, install pixel patcher, reboot.  AB beta works, but Claymore 9.8 fails to initialize.

XFX RX 480 4 GB BIOS, modded BIOS