What Audio card are you using?
Try disabling the driver for it and use the onboard audio
Welcome to the forum.
For the video portion of the issue, what is the version and date of your installed nVidia Quadro driver. It is likely that Del set your system up with a "master install disc," and the video driver is out of date. If so, download and install the latest from the nVidia site for your Quadro and your OS.
If it IS the latest, then I do not know the next step in troubleshooting what should be a great machine.
My first thought is that with any pre-built computer, the very first thing you should do is wipe the System drive and reinstall Windows from scratch, and then only the software you need for editing.
Purchased computers almost always come with a lot of crapware than you don't need, that could be interfering with the proper functioning of Adobe software. So, it's best to start fresh.