The "10c" in your keyword is simply shorthand for — users often omit the decimal point in file names.
No-CD patches like a “10c” build are unofficial modified executables created to remove the requirement to have the game CD inserted, often to improve convenience or compatibility for older games like Age of Empires II: The Conquerors. They can fix issues on modern systems but carry legal and security risks; prefer official re-releases or reputable community fixes and exercise caution if using modified binaries. age of empires 2 the conquerors no cd patch 10c
The 1.0c No-CD patch was more than just a convenience; it was a bridge to the modern era. Before the HD Edition (2013) or the Definitive Edition (2019) existed on Steam, this patch allowed the community to keep the game alive on Windows XP, Vista, and Windows 7. The "10c" in your keyword is simply shorthand