How to change when a Hardware Scan runs

Problem - every day at 2:21pm our customer service reps complain that their PC's lock up and their mouse starts moving uncontrollably across the screen. It only lasts for about 5 seconds but it's usually when they're on the phone with a customer and trying to type something.

Nothing else is happening on the PC at that time except a hardware scan followed closely by an update to the inventory server as shown in the included screen shot.

I've already rewritten the agent with a new maintenance window running all scans after business hours but that didn't help. I’ve completely uninstalled the old agent and reinstalled the new one but nothing seems to change when this runs. 

Does anyone have any idea on what I can do to change when those scan runs?

Thanks

Donna