Michael Lui - 2017-07-20

Hello!
I am new to use lexmaker.
Just downloaded and installed texmaker 5.0 for windows 10 64bit.
Successfully instatlled by when I ran it, and tried to preview the document, I received the following error message:
Cannot start the command
pdflatex-syntex=1-interaction=nonstopmode%.tex
Please help!
Thanks!
Best regards, Michael