Expired session before time

Hello,I have just dowload Rhino 5 and when I opened it ,it said the version has expired.What´s wrong?It is supposed to work free 90 days…

The timer mechanism we designed back in 2012 for V5 evals used to be pretty reliable. Later on, some changes in Windows and updates started breaking it. As a result, we developed a new system for Mac Rhino and for V6 Windows Rhino.
It might be possible to reset the timer and get it running again, but it is very likely to fail again. Contact your regional McNeel Sales office for help with resetting it. Expect it to fail again.

Is there some reason you can not use the V6 eval? It is reliable.

Thank you,I´m going to try V6