Leftover files from previous installations or conflicts with The Sims 3 registry entries can prevent the game from detecting the disc correctly.
Here are the primary culprits behind the error: the sims medieval no disc found
Fortunately, there are several reliable ways to bypass this check and get back to building your kingdom. Why Does This Error Happen? Leftover files from previous installations or conflicts with
If you own the expansion pack Pirates & Nobles , the "No Disc Found" error becomes more aggressive. The expansion has a secondary DRM check. the sims medieval no disc found