Pulled the following from a google doc, have you tried all these steps when installing MSI AB?
MSI Afterburner Guide
Completely uninstall old versions of MSI Afterburner
Restart computer
Download and install MSI Afterburner (latest stable version: 2.3.0 at the time of this guide)
Restart computer
Start both MSI Afterburner and MSI Afterburner On-Screen Display server
Open MSI Afterburner
Go to settings*
On the “General” tab:
Start with Windows
Start minimized
On the “On-Screen Display” tab:
Uncheck “Show On-Screen Display on captured screenshots and videos”
On the "Video capture" tab:
Choose a video capture shortcut (e.g. F9)
Choose a video format - I recommend MJPG
Choose your quality - You can go to 90% without seeing much of a difference in quality
Choose frame size - you always want 16:9 (e.g. 360p, 480p, 720p, etc) if you're uploading to YouTube
Choose your FPS: 30 is recommended, though go higher if you want to do slow-motion edits
Leave Framerate limit disabled
Choose your videos folder - recording to a separate hard-drive is best for performance
Enable gamma correction
For game/system audio (and not your own voice):
Keep audio source #1 as "Auto select" and audio source #2 as "None"
Downmix multichannel audio to stereo: stereo rip
For game/system audio with your own live commentary:
Set audio source #1 as "WASAPI playback device": Auto select
Set audio source #2 as "WASAPI capture device": Auto select
Downmix multichannel audio to stereo: stereo rip
Mix multiple audio tracks
Minimize MSI Afterburner
Open MSI On-Screen Display Server (the airplane with the pink numbers)
Start with Windows: On
Show On-Screen Display: On
Show own statistics: On
*If your settings window is too big for your screen:
Ctrl + tab to change tabs.
Temporarily reduce your desktop resolution
Alt + SPACE, M. Then use arrow keys to move***65279; window
Right click on the shortcut, choose properties. On the compatibility tab, check "Disable display scaling on High DPI settings"
If nothing seems to happen when you hit your record key:
Make sure both MSI Afterburner programs are showing up in your taskbar
Check the Active 3D Process in MSI Afterburner (the one without the pink airplane)
Add the detected program to the MSI Afterburner OSD Server - Set detection level to none
Restart both MSI Afterburner programs
If your recorded video files don't open in Sony Vegas or any other video editor:
Try enabling "Enable MJPG decoder"
If that doesn't work, download the KLite Codec Pack (both 32 and 64 bit if you have a 64 bit system)