This happens when you install with insufficient user privileges or tools like virus scanners interfere. Delete the caps.db, run teh cleaner tool and try again, avoiding the aforementioend issues by turning stuff off and using compatibility modes. Just get used to the fact that due to compatibility issues it may never work. Your version is pretty old for Win 8.1...
Use the CC Cleaner Tool to solve installation problems | CC, CS3-CS6
Important Directories | Mylenium's Error Code Database
Mylenium
