How to run the "runas" command without writing the password

Summary

Runas might not be supported but you could use a freeware utility CPAU http://www.joeware.net/freetools/tools/cpau/index.htm

This utility will allow you to launch an application using a different set of credentials then the current user. The neat advantage with CPAU over runas is that you can specify both the username and password at runtime. With the runas command you'd first have to configure a cached credential or be prompted for password at each run.

Examples

Using CPAU to launch iexplore.exe you could use a statement like:

from cmd prompt:

cd <path to cpau> -d
cpau.exe  /u domain\username  /p 123456  /ex "c:\Program Files (x86)\Internet Explorer\iexplore.exe" /lwp

from powershell script:

cd <path to cpau> -d
invoke-expression "cpau.exe  /u 'domain\username'  /p '123456'  /ex 'c:\Program Files (x86)\Internet Explorer\iexplore.exe' /lwp"

/lwp means to Load With Profile, and can be replaced with /lwop Load Without Profile