After returning from lunch, my Citrix Receiver timed out, and the active window border, its shadow, and selected text started blinking every second. This also undoes dragging the window and closes open menus.
This also happened yesterday. I've scanned the system with Trend Micro Housecall (found nothing), searched for hours, and installed every Windows update. What's going on? Is the HP Bios update to blame?
I'm using an HP 850 EliteBook on a HP 2013 UltraSlim Docking Station. Undocking doesn't help.