I have successfully installed Windows 8 about eight months ago, and all went well. Only the last change I made ??is to set Startmenu8, to get a more normal for the Windows look. Yesterday, my computer screen went dark blue and the mouse does not seem to work. I changed the battery and reboot. But all I get is my desktop, taskbar, and not ikony.Programmy not appear at the bottom, but do not open the maximum so I can not use them. I have a Dell desktop and run the diagnostics on the F12 at startup. All right in line with this. I want to return to the previous item, but can not get in Windows, to do it. Any suggestions gratefully received.