When you click on Setting > Deployment > Driver Management in the console, you get a Unknown or unspecified error pop up.
7.5 SP1 HF5
This is an environmental issue. In this case, BootWiz was pausing several times for a full minute and literally taking more than the default 5 minutes to return results. 600 seconds is the default timeout for any web page in IIS to wait for results if not told otherwise.
The solution was to make a change to the web.config file for Deployment Solution (Program Files\Altiris\Deployment\Web) to allow more time for this process to run before IIS times it out. We did that by editing this file and add on the httpRuntime line near the bottom of the file an executiontimeout="1200", so the line should look like this: