keras: Keras installation get error that the system was unable to find the specified registry key or value

OS: Windows10 python: 3.6.8 conda: 4.5.4

To reproduce:

1. open anaconda prompt
2. run: conda activate <my_environment>
3. run : conda install -c conda-forge keras

Output:

conda install -c conda-forge keras
Solving environment: done


==> WARNING: A newer version of conda exists. <==
  current version: 4.5.4
  latest version: 4.7.11

Please update conda by running

    $ conda update -n base conda



## Package Plan ##

  environment location: C:\Users\Ido\AppData\Local\conda\conda\envs\py36

  added / updated specs:
    - keras


The following NEW packages will be INSTALLED:

    keras:         2.2.4-py36_1            conda-forge
    libgpuarray:   0.7.6-hfa6e2cd_1003     conda-forge
    mako:          1.1.0-py_0              conda-forge
    pygpu:         0.7.6-py36h452e1ab_1000 conda-forge
    theano:        1.0.4-py36h6538335_1000 conda-forge
    vs2015_win-64: 14.0.25420-h55c1224_11

Proceed ([y]/n)? y

Preparing transaction: done
Verifying transaction: done
Executing transaction: done

(py36) C:\Users\Ido>set "KERAS_BACKEND="

(py36) C:\Users\Ido>python C:\Users\Ido\AppData\Local\conda\conda\envs\py36\etc\keras\load_config.py  1>temp.txt

(py36) C:\Users\Ido>set /p KERAS_BACKEND= 0<temp.txt

(py36) C:\Users\Ido>del temp.txt

(py36) C:\Users\Ido>python -c "import keras"  1>nul 2>&1

(py36) C:\Users\Ido>if errorlevel 1 (
ver  1>nul
 set "KERAS_BACKEND=theano"
 python -c "import keras"  1>nul 2>&1
)

(py36) C:\Users\Ido>SET DISTUTILS_USE_SDK=1

(py36) C:\Users\Ido>SET MSSdk=1

(py36) C:\Users\Ido>SET platform=

(py36) C:\Users\Ido>IF /I [AMD64] == [amd64] set "platform=true"

(py36) C:\Users\Ido>IF /I [] == [amd64] set "platform=true"

(py36) C:\Users\Ido>if defined platform (set "VSREGKEY=HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\14.0" )  ELSE (set "VSREGKEY=HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\14.0" )

(py36) C:\Users\Ido>for /F "skip=2 tokens=2,*" %A in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\14.0" /v InstallDir') do SET "VSINSTALLDIR=%B"
ERROR: The system was unable to find the specified registry key or value.

(py36) C:\Users\Ido>if "" == "" (set "VSINSTALLDIR=" )

(py36) C:\Users\Ido>if "" == "" (
ECHO "WARNING: Did not find VS in registry or in VS140COMNTOOLS env var - your compiler may not work"
 GOTO End
)
"WARNING: Did not find VS in registry or in VS140COMNTOOLS env var - your compiler may not work"
The system cannot find the batch label specified - End