AndyH

The weird thing is that Cakewalk Product Centre does exactly the same thing on a completely separate machine ('Internet Connection or Firewall' issues)

Yes, that's definitely it and it was only 're-installed' first think this morning.

I too am having problems with reactivation, to the point that I can't use CW at the moment. I got the 'reactivate' messages (had them before) and have followed the standard process (Help/Sign in to Bandlab) except this time round I am constantly getting a message (in a block coloured pink and purple) saying that it couldn't connect to Bandlab and that I should check internet connection and/or firewalls. I've been round the houses for 3 days trying to ensure that the firewalls are allowing CK to get through and I'm pretty sure I've set the permissions/rules up correctly. I've even uninstalled and re-installed CW, all to no avail. Today I opted to try and do an 'offline' activation. Tried to upload Cakewalk Product Centre onto our home PC and that too wouldn't allow access through the firewalls. Basically, something's changed in the last week and I am damned if can understand what exactly. The only thing I can think is that a Win 10 update has changed security settings on my machines, which is so severe that it overrides the firewall rules. If it isn't that then I'm goosed!! Please, does anyone recognise what I'm going through and can point me to a possible solution?

In theory you should open the Help tab and select Sign in to Bandlab. According to everything I've read that should be enough.