When I logged into PCA tonight a little grey box appeared in the middle of the screen saying Microsoft Internet Explorer with +kWs+ underneath, and a yellow circle with an exclamation mark on the left and an OK button at the bottom. Tried clicking the OK button but the box wouldn't close or go away Alt+Ctrl+Delete would do anything, had to power off. I have run AV and Ad-aware in case, but nothing. Any ideas what it might have been? Have tried Google search to find it.