Hippsie Gypsie,

I missed the 3-time requirement for running sfc (see below).
MalwareBytes is the only program I've run across with this behavior.
The Windows key-arrow combination only...

I tried the "Dynamic Duo" (DISM and sfc), but no change. One observation: when I start the program (MalwareBytes) it opens in its normal size; when I maximize it and reduce it again, it falls into...

I just rebooted--no difference. Also, the machine is not in Tablet Mode. and I haven't installed anything.

It just started this morning; no I haven'[t rebooted yet, but will this afternoon

On my Windows 10 machine, I just ran an app which somehow caused the window toget larger than I want. I tried dragging the sides to shrink the window, but the double-headed arrow wouldn't "grap" the...