I recently got an origanal copy of Half life from my Aunt. The disk is in great condition (No scuffs or scratches). I managed to download the application, but it refuses to run claiming "CD must be inserted" Even if the disc is already inside. To my knowledge I don't need a second disc. I don't know if it's a compatibility issue, launcher issue (Cause seirra doesn't exist anymore),or something else. I have a windows 11 lenovo Laptop. Any and all tips appreciated. THX!