There is another option, and that is to press F8 when you see the dell splash screen at boot, then select, Repair Your Computer.
Hello,   I have a new laptop dell XPS 1710 equipped with win 7 home premium 64 bit. In the Microsoft description of this edition, the media center should be available, but when I click on the existing icon present on the dock, I receive the following error message (sorry it is a translation) :  'Windows can't open this program because a software restriction strategy prevent from opening. For more information, please contact your system administrator.' I don't understand where this restriction is coming from and why? Media center is a part of this win 7 edition so why implementing a limitation! More important, do you know if it is possible to bypass this limitation?   Thanks for your help    
Win 7 Home Premium 64 bit & Media center