Unity doesn't work on Windows 10?

So I just updated to windows 10 and when i open unity it says that a licence issue has been detected. And when i try to re-Activate unity, then it just crashes! Can someone help me, are my project safe?

I had the I think the same problem, but it came when I updated windows 7 to windows 10 - then it did stop to work. I think you should try uninstall unity (from Editor) and then after that deleting all files of unity by deleting the file box of unity in program files. Then you should download again and try it. I think it should work.

It does work on Windows 10.

You may have to reinstall it though. They announced stuff here:
http://answers.unity3d.com/page/troubleshooting.html