Windows 7 doesn't boot up anymore

[Local Moonman]

I've recently installed Windows 10 technical preview on a different HDD and that worked. And then i decided to switch back to my usual OS windows 7, and it tells me this: "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key"

 

(This is when i select P2: ST500DM002-1BD142 in the BIOS. Reference the attachment)

 

And if i select a different HDD (not the one that has windows 7 or 10 installed, rather a secondary storage space), it boots up into Recovery mode and tells me that my PC/Device needs to be repaired. 

Error code: 0xc000000e

 

(This is when i select P0: ST500DM002-1BD142 in the BIOS. Reference the attachment)

 

and then it gives me the options to 

Press Enter to try again (Pressing this just flashes my screen)

Press F8 for Startup Setting (This one also just flashes my screen)

Press F9 to use a different operating system (This one takes me into several different options, these can be seen in the attachments)

 

Then, it gives me the option to 

 

Startup Repair (Tells me i have no errors)

System Restore (I dont have a backup)

System Image Recovery (I dont have a recovery)

Windows Memory Diagnostics (I dont have problems with my RAM)

Command Prompt (Well, i dont know how to use command prompt unless i have a tutorial)

 

Please Help!!!!! 

[Levent]

this might work.

http://www.howtogeek.com/howto/32523/how-to-manually-repair-windows-7-boot-loader-problems/

[Local Moonman]

this might work.

http://www.howtogeek.com/howto/32523/how-to-manually-repair-windows-7-boot-loader-problems/

now it gives me this when i try to repair from the CD as the website said.

[Paul_VB]

Did you try booting with only the win7 boot drive connected to the mobo?

[Local Moonman]

Did you try booting with only the win7 boot drive connected to the mobo?

yeh, still gives me the same thing. i did the ScanOS in CMD and it told me i have no OS installed.