Windows only boots when drive is connected to usb

[Mastrmnd]

I have a ssd as my boot device. Bios sees it when connected to sata, but Windows Wont boot. Just a black screen with blinking underscore. Boots fine when plugged into usb however. Any ideas?

 

[cin19]

Maybe during you install the OS, you still plug the USB in. If the answer is yes, you may try Startup Repair method to fit the problem. http://pcsupport.about.com/od/toolsofthetrade/ss/windows-7-startup-repair.htm