Computer problem windows 7 64

I use this system for 3 years now and had a problem with my harddisk, i tried 2 different disks both SSD and having  exactly the same problem
After a new installation of a windows 7 64 everything looks perfect till i remove the usb disk.(i can not even use safe mode just a black screen with a blinking cursor) if i insert the the usb it will start again
I use this installation many times and curiously it doesnt matter what kind of usb disk i use, if a usb is inserted it WILL boot (That can also be a solution:)
ECS A740GM-M Motherboard and AMD Phenom X4 9450
samsung evo 250Gb
chinese brand 128Gb

Thanks Danny
Danny KonAsked:
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Seems you have installed the OS on the USB drive instead of the internal drive?.
Install OS on the internal drive
Boot the PC with a partitioning tool and select the internal disk, then make the partition on which the boot files are on "Active", or enable the "Boot" flag (depending on the tool you are using). You can use the PCRepix Live-DVD which includes GParted:
Something I forgot to say above is to make sure your internal disks are included in the boot priority of your BIOS.

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Danny KonAuthor Commented:

It was maybe not 100% the solution but you let me remember that i didnt check the BIOS good enough, then i see in the bios that the diskcontroller was (maybe reset to default?)set to AHCI and this gave problems, i put it back to IDE and reinstalled windows  and everything is working again. (It 's still strange how the problem revealed itself:)

Thanks for helping

You should really not use IDE mode to install Windows on, particularly not with SSD's. With IDE mode you don't get most of the advantages of speed and advanced instruction sets which you get with AHCI.

There should be no problems installing Windows to disks running in AHCI mode. Just make sure you use the correct drivers of the mainboard when installing the OS.
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Windows 7

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