I am pretty sure bigfix can be used to change screen resolution.
I think this has been used to do this in the past: https://sourceforge.net/projects/qres/
This is another option: http://www.nirsoft.net/utils/nircmd.html
I have never done this using PowerShell. I’m also not certain that it needs to be run as the current user to do this.
If you really want us to be able to debug your code, then you need to provide the contents of the BAT file you are using, as well as the contents of the PowerShell script. Just paste them into the forum and I can fix any formatting issues after the fact.
Also, if you are going to post things to the forum, be sure to redact your root server URL and similar info.
References:
- http://superuser.com/questions/89302/any-way-of-changing-windows-7-screen-resolution-via-command-line
- http://www.nirsoft.net/utils/nircmd.html
- http://stackoverflow.com/questions/15324290/batch-command-to-change-the-resolution-of-a-computer
- http://stackoverflow.com/questions/32153038/how-to-change-screen-resolution-and-the-size-of-items-using-command-line-program