I am using asus notebook f5sl and running windows 8pro, but unfortunately I cannot upgrade to win 8.1 pro, many info's that said , I have no secure boot in my bios notebook. So is there any idea that I can solves this problem. Thank you.
i don't understand what you mean,one of my computers is a hp notebook that had 8 pro,went to win store and upgraded to win 8.1,i don't have secure boot in my bios,but everything went fine,now have win 8.1 installed
secureboot only left a watermark when not used. Updating your computer with the november rollup on windows update includes this fix. It will not display the watermark even if you have no option to enable secureboot