Many people have experienced this and i hope ROBLOX understands people is upgrading to windows 8.1. The problem is i upgraded my laptop to that version, and of course, re-downloaded ROBLOX. Once i tried, however, it crashes everytime, not even by setting it on compatibility mode with Windows 7 it'll work, i've done countless things to make it work with no sucess, if anybody knows the solution.
NOTE: This is not the game itself, it's the installer |