[Edited by EA_Mai: discussion of piracy is not allowed]
For those unable to play the game on newer operating systems:
Old versions of Windows contained a driver called secdrv.sys. This was used in conjunction with SafeDisc and/or SecuRom DRMs, which were both used as means of copyright protection for games and other media stored on discs. However, several years ago, SafeDisc was found to be a major security flaw, as secdrv is "embedded deep within the operating system" and hackers were able to exploit it to gain full control over a computer. Thus, SafeDisc was slowly abandoned over the course of a few years, with it being deactivated by default from newer Vista updates up to Windows 8, and it being totally omitted from Windows 10.
This means that most old games, like Harry Potter, will not work on newer systems, because they require access to the secdrv driver and SafeDisc protocols. This is also why running Harry Potter games in compatibility mode will not get them to run. The game will not run at all on Windows 10 for this reason (unless you manage to find some patches, which probably isn't a good idea and may not even fix the issue.)
If you are running Vista, 7, or 8, though, there is a way to re-enable secdrv which should allow the game to run after installation. However, I personally wouldn't recommend this as you are opening your computer up to hackers. If you have an old computer lying around, and are lucky enough to also have some Windows Vista or 7 installation discs somewhere (if your extra computer doesn't have an OS installed), I would recommend installing an older OS on an older computer if you can, preferably one you don't need connected to the internet. This way, you can safely enable secdrv. If you don't care about security or want to activate it temporarily, you can do this: open Command Prompt (Press Windows Key + R, type cmd, then hit enter), and type the following command:
sc start secdrv
and hit enter. If it doesn't work, run command prompt as an administrator and try again. If it still doesn't work, basically your only option is to download sketchy cracks or patches and probably fill your computer with malware. If you just wanted to enable it temporarily, enter the following command into command prompt to stop the secdrv driver:
sc stop secdrv
Hope I helped some.
For more information, take a look at these sites:
https://pcgamingwiki.com/wiki/Harry_Potter_and_the_Chamber_of_Secrets
- Tips on accessing widescreen, VSync, fixing low frame rates in Windows 8, and other fixes.
http://www.wsgf.org/dr/harry-potter-and-chamber-secrets
- Tips on upping the resolution of the game
https://www.howtogeek.com/230773/how-to-play-pc-games-that-require-safedisc-or-securom-drm-on-window...
- Article about playing old games on new systems
