WINDOWS 7 BOOTS BUT LOCKS UP

[Gos]

Hi, this is my first time posting on this forum...but I have an issue I just cant for the life of me figure out.  I upgraded my PC recently.  The only thing I carried over to the new build was my OS and my graphics card for now. My old build was and AMD8350 with a gtx 780ti and 8gb of ram running windows 7 64bit on an old cheep am3+ motherboard.  Now  My PC is i9900k with 32gb of ram and an old 780ti still on windows 7.  *Trust me know how ridiculous that 780 ti looks in that system and running windows 7*..however I am waiting for the new "SUPER" NVIDIA cards to come out b4 I buy. I have already bought windows 10. But that won't come in for a few days. Now down to the issue. When I boot the pc it seems to load fine and get to my windows log-in screen, however when I go to type or if I hit Ctrl+Alt+Delete nothing happens. This same freeze happens in every safe mode as well. But  When I throw my GPU and ssd's with the OS into the old system it works completely fine with my keyboard and mouse.  I know it's not the drivers as far as the mouse and keyboard.  I set up the bios to be running legacy boot options since I have windows 7 still. In the bios my main drive with windows is the selected boot device and  For my bios/motherboard I'm running Asus maximus xi.  If you have any questions or any thought and what this could be please ask I am completely  lost and I have tried everything I know. Please help. 

[Enderman]

6 minutes ago, Gos said:

The only thing I carried over to the new build was my OS

Yeah...see...the problem is you can't do that.

Different hardware, you need to clean install windows.

[Gos]

4 minutes ago, Enderman said:

Yeah...see...the problem is you can't do that.

Different hardware, you need to clean install windows.

Okay thank you!!! Appreciate that!