Unity 5.3 has been running fine on my system for months. No hardware changes.
Over the weekend, Windows 10 updated itself.
This morning Unity 5.3 would not run. It launches, nothing at all appears on screen – no project load screen, no license or login screen, nothing. Task Manager showed Unity.exe running using 0% CPU.
Tried all of the “fixes” I could find here, including running from command line forcing it to use OpenGL modes, specified a log file location – no changes, same result, and never creates a log file.
So I completely un-installed Unity, and installed the latest version (5.4.2f2).
Exact same issue. Unity.exe shows up in task manager using 0% CPU (and some memory), but nothing visible ever happens. Same tries with command line options.
I’m completely at a loss. Help?
Did another complete un-install, then searched for "unity" in the registry and deleted every occurrence. Reinstalled...same issue.
– paullefevreFixed! OK, don't laugh...the windows upgrade for some reason put unity as "blocked" in my anti-virus/firewall. Disabled the av, and unity ran. Set it for allowed, and all good. No message from either av or firewall that it was blocking it, though...which is annoying. If anybody else runs across the same problem, try temporarily disabling your anti-virus.
– paullefevre