Hi Brink, I stumbled upon this thread because a few months ago my Rode SmartLav+ (lapel microphone) was working fine when plugged into my desktop's front HD panel (Realtek) but since doing a fresh install of Windows a few weeks ago, it no longer works when I connect it to my PC. The mic still works because I tested it by connecting it directly to my smartphone.
So I thought about updating the drivers... Im on Audio Driver Version 188.8.131.5223. This is the lastest one posted by Asus (manufacturer of my motherboard) but it's last update goes back to October 2013! So I dont know why my mic was working thru the front panel before... should I try updating to the generic lastest 64-bit version you posted?
I should add that a similar issue occurs on my Asus laptop, only in this case when I plug in the mic, Windows asks me if its headphones or speakers. Um, its neither! And it doesnt even show as an option in Recording Devices. This one's latest update also goes back to 2013.
Not sure if there is a connection between the issues on my laptop and desktop... both are Asus, both latest update to specific product go back to 2013, trying to use the same mic in both machines, but difference on desktop is dedicated MIC input on front panel while on laptop is mic/phones combo jack.