Every time I open my computer and go to the Desktop I encounter an alert dialogue box that shows nothing but a blank alert dialogue box with the warning icon (exclamation point inside a yellow triangle) and an "OK" option. Just that. No other message. The title of the dialogue box is Explorer.exe. When I click "OK" or close it (by clicking "X") the dialogue box appears again and insists for two or three times.
The weird thing is, last night the dialogue box has a message saying, if I remember correctly, "Explorer.exe not found." But I'm not very sure if that's exactly the message, since I just clicked "OK" (again for three times) and decided to fix it tomorrow morning. But now, the alert dialogue box is just blank. So I don't know what kind of error it's warning me now.
By the way, I'm using Windows 8, which crashes occasionally. Any help?