Can we see a screenshot?
What are the pixel dimensions of your display? Is your display too small--pixel dimensions below the minimum?
Is there any chance that your workmates are using a full version of Photoshop, but you are using Photoshop Elements?
I don't think this is what is being talked about, because there is no radial filter in the PSE-hosted ACR, so the details of seeing one instead of two screens and not scrollbar in the radial filter doesn't make sense for a PSE-ACR.
Check the process version under camera calibration. It has to be 2012 in order to see all the radial filter options. ACR for an older image will come up with a down level process, i.e. the one first used on the image. Click on the exclamation mark in the lower right hand corner to invoke Version 2012, the latest.