Spark installation on Windows 10 -The system cannot find the path specified Error is displayed

All the Prerequisites are met
16GB RAM
Windows 10
64 bit

I have setup python version 2.7.14 on Windows 10 and validated python program
Also configured environment variables for python
I have also installed Pycharm on Windows 10 and executed python programs in the tool

Downloaded spark spark-1.6.3-bin-hadoop2.6.tgz and installed 7z to untar on Windows 10
I have placed the Spark folder in C drive (C:\spark-1.6.3-bin-hadoop2.6)

I have installed Java jdk-8u151-windows-x64 and
jre1.8.0_151 and jdk1.8.0_151 are available in C:\Program Files\Java folder
I configured environment variables for Java and in command prompt java -version , javac -version are showing results

I have configured environmental variables for Spark and updated the PATH variable
SPARK_HOME C:\spark-1.6.3-bin-hadoop2.6
PATH %SPARK_HOME%\bin

When i am trying to run pyspark its throwing an error "The system cannot find the path specified "

Tried the below but still has the same error
pyspark
pyspark.cmd
spark-shell

Attached screenshot for reference .

I have tried multiple times . Can you please help me in resolving the issue