Weird Black Box in Top Left of Screen
My first post here as I am totally confused as to what is happening to my computer!
I have a Dell laptop Studio 14z with 4gigs of ram, 512mg graphics, i7 processor, etc. Plenty of power for what I do which is mostly word doc, ppt, occasional photo and video editing. I usually use chrome for web browsing and avast for virus control.
Long story short, about a month ago, I came back to my laptop, moved the mouse to awake the screen and in the top left corner was a black with a blue border. I usually restart my computer and its gone, sometimes I simply ignore it, come back a few hours and its gone. I have tried Ctrl+Alt+Del and ending a few processes I was unfamiliar with but the screen remains. It is not there every time, but frequently is.
I didn't make any changes to my computer shortly before the screen arrived to my knowledge but my gmail account was hacked a week or two ago so I have gotten concerned it might be a key logger or something of the like.
Any help yall could provide would be immensely useful! Thanks a lot!