I have PI installed on my main PC, no problem.
Today however, I tried to install it on my laptop, so that I can take the software to demonstrate it at my 'local group' meeting tomorrow.
I logged into the PI website, and downloaded a fresh copy of the Win 64 package, then installed it without problem.
When I try to activate it using my 'User Identifier' and 'Activation Code', the server rejects it as an 'invalid activation code'
I checked the code entered, double checked it, treble checked it , and tried multiple times to activate it, without success.
I have even tried changing the 1 for I, and the I for 1, but still no joy.
Dave