Hello, I used to have the same issue with microlite. When I first had the microlite, I was using Windows 7, and it was never a problem. It wasn’t introduced to me until Windows 8 and future versions of windows.
I noticed that if I turned on my PC and quickly jumped into Nuendo, it would intermittently show as the ports missing. The workaround is to wait a few minutes after bootup. I gauge the time by looking at the process completion for Intel Rapid Storage Technology. Once I see the blue circle change to a green check, Nuendo always finds the ports. This was very frustrating for me. At first, I thought it was the drivers. Then, I bought a new microlite and that didn’t solve it. And then one day it dawned on me that the PC had booted up so fast, yet my mouse hadn’t shown up yet and but after few seconds it did. It just made me think, perhaps, when windows changed over to the fast boot up, something changed in the way USB ports are activated.