I just installed Unity and it won’t start. I get an error message from Unity Editor. “Unity Editor has Encountered a problem and needs to close. We are sorry for the inconvenience.” I tried restarting the computer. I was also playing a game that runs Unity on the web, “Deadfrontier”, and it seems to be having some problems as well. (This was before I installed Unity.)
1.If u installed previously then is not possible to install now. main thing is u want to get unity pro license . After that enter ur serial number then u got the license.
2.If u want unity free version then u uninstall the unity pro version after download and install the unity free.