Windows 10 won't run some older CD-ROM games, thanks to DRM
In Windows 10, however, that’s no longer possible: Windows 10 does not allow the SecuRom and SafeDisc DRM schemes to run, which means the games will fail to start. Boris Schneider-Johne, Microsoft’s German marketing manager for enthusiasts, explained the situation during Gamescom earlier in August (translation courtesy of Rock, Paper, Shotgun).
The two DRM schemes were thankfully short-lived—they ran primarily between 2003 and 2008, according to Schneider-Johne—so the number of games affected by this is relatively small.
The impact on you at home: Windows 10’s refusal to run DRM is a very simple example of how owning digital property with copy protection never turns out well for the consumer. Some games may already have patches that fix the issues the DRM caused, or you can re-purchase the game from places such as GOG.com that sell versions already patched. Alternatively, you could just run an older system and not bother with the upgrade, or you could try running the games in a virtual machine.