i am trying to install windows 7.in boot mode. when i start PC it says "press any key to boot from cd/dvd" then it loads windows files but it doesn't shows cursor on screen i.e the loading ring of windows 7 and cursor. and it displays first screen i.e select keyboard style and time currency format and language to install. at that time keyboard doesn't work and mouser doesn't work as it doesn't shows cursor. but cursor and keyboard work fine in windows 8 consumer preview setup