Scheduling Stop/Start Routing and Remote Access

Hi,
 
 I have Windows 2012 Server and Routing and Remote Access service stops at time for no good reason.
 So instead of troubleshooting the issue, I decide to run a scheduled task to stop/start RRAS service every hour or day using a batch file "Restart-RRAS.bat" with two commands
net stop remoteaccess
net start remoteaccess

But I learned that I could not run it in normal command window. Rather I have open "Command Prompt(Administrator)" to run these commands. I also learned that I could use RUNAS command like:
RUNAS /netonly /user:vpn\administrator cmd, but the problem is that I have to store password in a text file which I don't want to do.

Is there a better solution?

Thanks.