Download Jmeter and execute the batch file (Jmeter\\apache-jmeter-2.6\\bin\\jmeter.bat).
We get the error message in the console:
Unable to access jarfil
Try downloading apache-jmeter-2.6.zip from http://www.apache.org/dist/jmeter/binaries/
This contains the proper ApacheJMeter.jar that is needed to initiate.
Go to bin folder in the command prompt and try java -jar ApacheJMeter.jar if the download is correct this should open the GUI.
Edit on 23/08/2018: