Hi, I have a problem starting up W7 in dual boot. I did a clean install of the W7 RTM on the second partition of my (sata) HDD. After installation I didn't get a dual boot menu to choose my OS (Vista or W7) I forced a dualboot menu with Vistabootpro, but when I choose the W7 option, I get an error telling me that "the digital signature of winload.exe can not be verified" After that I accidentally discovered that W7 can start-up when I have the install DVD in my dvd-drive. It prompts first with the massage "To start from DVD press any key" Then when I don't press a key it starts booting W7. How can I get rid of this procedure and ad W7 working in a dual boot menu?