Istalling older games on Windows 10

first you must make sure your operation system is right for it andtry uninstalling any old games some times your games will install the same running programms twice . And make your computer is downloading it in the correct location.

You should tell us which specific "installation problems" you have, game by game.

1) On a very general and basic level, it's worth a try to install games written or re-written (C&C 1stDec) for Windows XP in compatibility mode. Assumed you install from CD/DVD, disable Auto-Play and run "Setup.exe" (main folder on the CD/DVD disc) in compatibility mode for "Windows XP SP3" (or SP2, or XP alone, depending on the security level the game can digest) and "run as administrator". When installation is finished, don't start the game yet but make sure that the same compatibility settings are applied to the "[game].exe", too (usually in your game folder on the harddisk, sometimes in subfolders like "bin").

2) Under all circumstances, don't install your games in the C:\Program Files (32-Bit OS) or C:\Program Files (x86) folder (64-bit OS). Those folders are UAC protected (since Vista) and should only be used by programs capable to handle UAC (User Account Control); if you don't like to react permanently to warnings like "This program wants to do this and that. Do you allow it?" and instead would like to play your game, avoid those folders by all means.

3) DRM issues may additionally arise because the old methods to secure that a game CD is inserted, are getting more and more obsolete in times where most games either are downloaded from a digital distributor (Steam, GOG, Origin...) or - if you happen to buy a boxed retail version - at least registered on one of those digital platforms (authenticating your DRM rights with it). As a logical consequence, most of the old CD-check scanners (Securom, SafeDisc, etc.) are only partially updated and may be even considered as a safety risk for modern OS software. How to bypass that... would be another discussion. For now, back to line 1.