It appears "defense-in-depth" means a newly engineered way to defeat the test signing, which also means no one could try to update SECDRV to fix "vulnerability problems" , a task which ROVI (formerly Macrovision) claims belongs to Microsoft, and which Microsoft had done before for Win 7 and Win 8. (Ref: http://www.rockpapershotgun.com/2015/08/17/windows-10-safedisc-securom-drm/).
So it is plainly clear that this is an "in your face" from MS to users: they think they have the power to force you to restock with new games from the MS app store with a tantalizing free or low cost OS upgrade (a very Apple-like strategy). Further, when one finds and publishes a work-around here or on other Windows tech sites, Microsoft rushes to defeat the workaround instead of fixing the driver, AND MAKE THE FIX RETROACTIVE so you can't even revert to an older Windows version to continue to play your favorite games INCLUDING POPULAR MICROSOFT GAME TITLES.
It now looks like "Microsoft Insecurity":
- "Apple is killing us in the market place - phone / wearable / tablet / software sales and stock prices"
- "Popular older games are killing X-box"
- "We aren't getting our share of the 'pay-per-play' market"
Boo hoo, boo, hoo....
"So lets boost sales, shore-up X-box and force all those legacy game players online so we can get more pay-per-play money by disabling all the legacy games we can with 'security updates' - yeah, that'll do it!"
Big companies, small minds...