I recently upgraded to Unity 5.6.03f It was working fine for a few weeks until now. Now it won’t go further beyond the project selection screen. All I get is a frozen white screen as soon as the editor opens, like the image attached.
I searched for a fix online so I deleted the library and temp folders and tried to rebuild everything. When that didn’t work I completely deleted and reinstalled unity but still nothing has changed.
How can this be fixed ?
I had this problem too, usually when I wake up my computer from hibernation, but just launching Unity again made the trick 
Anything in the Editor log file?
I had a similar problem last version, I could only solve it via using the latest backup of my project.
tried everything but didn’t work 
This is the last page of it.
Launched and connected shader compiler UnityShaderCompiler.exe after 1.58 seconds
Refresh: detecting if any assets need to be imported or removed … Refresh: elapses 0.007396 seconds (Nothing changed)
EditorUpdateCheck: Response {updateinterval: ‘3600’} updateurl = interval = 3600
Issue TrimJob to reduce GI Cache size to maximum 10GB at: ‘C:/Users/Win-8/AppData/LocalLow/Unity/Caches/GiCache’
[00:00:02] Enlighten: Precompute started.
TrimDiskCacheJob: Current cache size 148mb
[00:00:02] Enlighten: Finished 1 Layout Systems job (0.00s execute, 0.00s integrate, 0.05s wallclock)
[PathTracer][LP] Issuing deduplication and tetrahedralization job. Combined: 80257199cfa681a16be5e09b3c2208f4, tetrahedralized probes: 00000000000000000000000000000000, non-tetrahedralized probes: 00000000000000000000000000000000, dependencies: 00000000000000000000000000000000
[00:00:02] Enlighten: Finished 1 Tetrahedralize Probes job (0.00s execute, 0.00s integrate, 0.05s wallclock)
[00:00:02] Enlighten: Precompute took 0.101396 seconds.
Enlighten scene contents: 0 geometries. 0 instances. 0 systems. 0 probe groups. 0 cube maps. Scene is up-to-date.
[00:00:02] Enlighten: Bake started.
[PathTracer][LP] Integrating deduplicated and tetrahedralized probes for hash 80257199cfa681a16be5e09b3c2208f4.
Setting up 4 worker threads for Enlighten.
Thread → id: 2f90 → priority: 1
Thread → id: 2f78 → priority: 1
Thread → id: 21c8 → priority: 1
Thread → id: 16c4 → priority: 1
[00:00:02] Enlighten: Finished 1 Bake Runtime job (0.03s execute, 0.00s integrate, 0.05s wallclock)
[00:00:02] Enlighten: Bake took 0.049900 seconds.
[PathTracer] Lightmap reset.
UPID Received ‘17e4f0de-2179-494c-9307-be19748d1e8a’.
[PathTracer][LP] Light probes reset.
[PathTracer] building lightmap data asset.
[00:00:02] Enlighten: Reflection Probes started.
[00:00:02] Enlighten: Finished 1 Ambient Probes job (0.00s execute, 0.00s integrate, 0.06s wallclock)
[00:00:03] Enlighten: Finished 1 Reflection Probes job (0.00s execute, 0.00s integrate, 0.05s wallclock)
It freezes even when I create a new project
