In case persons following this thread didn't see my post earlier today on my own thread about problems I was having between Glo and ADE/ DRM content:
Before performing the factory reset and re-setting up your Glo from the factory reboot, FIRST un-install the Kobo Desktop application that's on your computer from your previous installation.
I didn't do this on my first re-setup, and that's when ADE stopping recognizing my Glo even though Windows could see it, and Glo had lost its Adobe authorization for DRM content. However, on a hunch, I tried again after first uninstalling Kobo Desktop. On the re-setup following the factory reset, I got a few rather different screens from Kobo Desktop during setup, even though when finished I discovered that it was the same version of Kobo Desktop as what I'd had before. There may have been something corrupted in the Kobo Desktop from the first ("unclean") reinstallation, which might have been causing the ADE/DRM issues.
If all else fails, try this. Uninstall Kobo Desktop from your computer. Then do a factory reset on Glo. Then re-setup Glo, which will result in an automatic reinstallation (this time a clean one) of Kobo Desktop. Then connect to ADE and authorize the Glo. It worked for me.
Of course the factory reset will remove all e-books on your Glo and all your annotations, bookmarks, and bookshelves. But you'll be able to get at your e-books again through ADE, after re-authorizing it (which should happen automatically when you open ADE after FIRST connecting your re-setup Glo to your computer). It's a nuisance, but it will work, or it did for me.
other advice: once Glo is up and running, NEVER log off your Kobo account from your Glo settings menu (that's what triggered all my problems), no idea why it should be so problematic to do that but it was in my case. And, if you buy content from Kobo's ebook site, don't use Kobo Desktop to sync or download the content to your Glo, go to your Purchased Items folder on your on-line Kobo account and install the book into ADE by running the link you get from the "Download epub drm" button next to the item in your Kobo account purchases list, and then drag it into the Kobo shelf in ADE after you've connected the Kobo to ADE. It doesn't take any more time to do this (I found Kobo Desktop excruciatingly slow in syncing and updating new content anyway) and in my experience it's much more reliable to do the transfers via ADE, once you can connect to it.
Don't bother syncing content on multiple devices via Kobo website or apps, it was a nightmare between my Glo, Wifi and iPod app, and caused me far more grief than it was worth IMO. If you want to sync bookmarks across devices, do it manually, not via Kobo's software; it's safer manually, and given the problems that I encountered, it would actually have taken me much less time and with more satisfactory results in the end.