I'm getting a gray screen whenever I start up my computer. It only stays on for a couple of minutes before the taskbar shows up along with the files on the screen. The gray screen started showing up after I downloaded WindowBlinds and changed my theme. I also changed my desktop background and changed it to a slideshow. I really doubt this is a virus since it disappears after a while but it's a nuisance. I ran a scanner with (updated) McAfee and Ccleaner. McAfee didn't pick up anything and Ccleaner didn't fix it.
So, is the gray screen like a loading screen for my desktop? If so, how can I fix it?