Microsoft Disables SafeDisc DRM in Windows Vista, 7, 8 & 10

Straight from the Horses mouth:
Summary:
In addition to the changes that are listed for the vulnerabilities that are described in Microsoft Security Bulletin MS15-097, this security bulletin addresses a defense-in-depth update for the secdrv.sys driver, a third-party driver. The update turns off the service for the secdrv.sys driver. *****This may affect the ability to run some older games.*****
Microsoft has instruction on how to allow the DRM to run and how to disable the DRM when it's no longer required.
See the Bulletin here: https://support.microsoft.com/en-us/kb/3086255