Today I had a problem when any program that I am trying to debug in VS2015 takes an age to load all pdb for my program and other programs (about 20 minutes or more for a simple dx12 sample). I could skip them, but actually I really want them to load for various reasons.
This is not a problem with a solution or project, since I get the problem of debugging standard microsoft samples, i.e. dx12 samples posted on github. I believe that all my settings are correct for character settings, here are my settings:

I already tried to clear my character cache and load them again. It also takes age! My character cache is on an SSD, which is working fine. My internet connection is a great way to listen in 19 ms, 45 MB down, 18.7 MB.
One unexpected thing is that messages say that characters cannot be found:
'D3D12Fullscreen.exe' (Win32): loaded "C: \ Windows \ System32 \ ntdll.dll". Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C: \ Windows \ System32 \ kernel32.dll'. Cannot find or open PDB file. 'D3D12Fullscreen.exe' (Win32): loaded 'C: \ Windows \ System32 \ KernelBase.dll. Cannot find or open the PDB file.' D3D12Fullscreen.exe '(Win32): loaded' C: \ Windows \ System32 \ user32. dll. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): loaded 'C: \ Windows \ System32 \ win32u.dll. Cannot find or open the PDB file.' D3D12Fullscreen.exe '(Win32): loaded' C: \ Windows \ System32 \ dxgi. dll '. Cannot find or open PDB file.' D3D12Fullscreen.exe '(Win32): Loaded' C: \ Windows \ System32 \ D3DCompiler_47.dll '. Cannot find or open PDB file.' D3D12Fullscreen.exe '(Win32) : loaded "C: \ Windows \ System32 \ gdi32.dll. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): loaded 'C: \ Windows \ System32 \ msvcrt.dll. Cannot find or open the PDB file.' D3D12Fullscreen.exe '(Win32): loaded' C: \ Windows \ System32 \ gdi32full. dll. Cannot find or open the PDB file.
(it only took 10 minutes to reach the end). This is really strange since you can see that they are all standard DLLs.
Any help would be greatly appreciated.
Thank you very much in advance.
I am using this version of VS2015:
Microsoft Visual Studio Enterprise 2015 Version 14.0.25425.01 Update 3 Microsoft.NET Framework version 4.6.02001
Installed Version: Enterprise
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System Information from dxdiag:
------------------ System Information
Time of this report: 9/4/2016, 22:15:11 Machine name: REMOVED Machine Id: Unknown Operating System: Windows 10 Pro Insider Preview 64-bit (10.0, Build 14915) (14915.rs_prerelease.160826-1902) Language: English (Regional Setting: English) System Manufacturer: LENOVO System Model: 20378 BIOS: 9ECN31WW(V1.14) Processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz (8 CPUs), ~2.5GHz Memory: 16384MB RAM Available OS Memory: 16296MB RAM Page File: 6018MB used, 13221MB available Windows Dir: C:\WINDOWS DirectX Version: DirectX 12 DX Setup Parameters: Not found User DPI Setting: Using System DPI System DPI Setting: 240 DPI (250 percent) DWM DPI Scaling: UnKnown Miracast: Available, with HDCP Microsoft Graphics Hybrid: Supported DxDiag Version: 10.00.14915.1000 32bit Unicode