If i want to choose any option which requires UAC options, YES is always grayed out. I am using Windows 7 for less then a year in my new PC, but later on I wasn't able to select YES. I set an admin account but I only see 1 account as SREE and another option where I have to type both username and password. I am unable to download stuff from the internet (which require UAC) or choose any option like the account name or so which requires UAC approval.