There are many ways to convert Windows batch script files to .exe files;
Unfortunately, most of hit methods when searching with https://www.google.co.kr/?gws_rd=ssl#newwindow=1&q=bat+to+exe
may not work or may not satisfy your quality demand;
Many of these naive implementations may let most of antivirus apps consider your result .exe file as a malware;
I tested several tools but until now, AutoIt is the best tool to convert .bat to .exe
Workflow: