If you want the feel of Championship Manager 2008 but without the security risk, consider playing Football Manager 2008 or FM 2009. These are also abandonware, but the modding community for FM is ten times larger. You can find database updates for FM 2008 that allow you to play with modern 2026 squads on the 2008 engine.
Searching for a Championship Manager 2008 free download leads to a confusing landscape:
If you are determined to play CM 08, you have three legitimate—or semi-legitimate—paths. We have ranked them from best to worst.