Hey guys iv’e been using Horizon Diamond for close to 2 years now and never come across this…?
My Horizon is saying it’s offline and cannot connect to server and it wont let me log in or anything. Iv’e tried uninstalling and updating to newest version but still same outcome… I’m using Windows 10 also and have been with no issues on Horizon since February. My firewall is off and my anti-virus has Horizon on it’s accepted list.
Any help here guys would be much appreciated 
I was only using it two weeks ago also and it was perfect then, Cheers!!