I installed Windows 7 x64 on my desktop (using the same disk which I used to successfully install it on my laptop). It finishes the installation process just fine, but when I boot up, I'm stuck at the black screen before "Welcome to Windows", like, it doesn't boot up at all, the bootloader seems to be there but there's no boot. Happened two times already, fixing the boot using the W7 DVD didn't help, it says it's all fine. Any ideas? P.S.: It doesn't even boot up to do the post install (username, activation, etc).