"why can't i install nor play simcity 3000 unlimited? "
Details of what is, or is not happening, and your system specifications, including brand and model
graphics processor, should be included as a matter of course in any question regarding games, but...
- Most (many ?) but not all, pre-2000 release games tend to have at least one of a host of issues not found
in post 2000 games, but many of these problems have fixes which can be found on the games fan sites.
- The vast majority of games released from 2000 on are compatible with Win10. If a game runs on
Win7 it will most likely run on Win10 as well.
- There is one big issue with disk based games on Win10, but this should not normally stop a game from installing .
This is Win10's DRM Blocking 'feature' . I don't have the details on this particular version of SimCity,
but if the disk has a file with the title - secdrv.sys - on it Windows will prevent if from launching.
You can read more about DRM Blocking in my post on ---this thread---
btw - Good Old Games is a good place for old games.
Their games install with DOS BOX, or ScummVM when one of these emulators is required for the
game to run in modern Windows. This saves the hassle of learning how to use the emulator software.
(They have 2000 and 4, but no 3000)
.