Hard Drive Issue

hey all.. my son got a new graphics card, and upon installing it windows started to load and froze. After this he (we) can no longer load windows. It stated NTDLR is missing. I tried putting the windows CD in the CDROM drive and doing a repair, it's telling me windows could not find a hard drive, hit F3 to esc. And we keep going through the same thing even when trying to re-install windows. This is a BRAND NEW hard drive and graphics card. I have NEVER had this many problems before. I have downloaded the software from seagate to diagnose the hard drive even, can't get that to run either. I'm getting VERY fustrated here as ive been fixing computers for a very long time and have never dealt with something like this before. Can someone please help?

It sounds like there could possibly be a hardware conflict between the 2 pieces of hardware. It might be worth trying to reinstall your old configuration or try booting without a GC (if youve got onboard).

Maybe check the connections for your GC, HDD and MoBo

I already removed the graphics card once the computer froze up. Now it's not reading the hard drive at all. I'm really confused on this one.

I fixed it on my own! But Thanks anyways! I just don't give up!!!!

possibly a SATA harddrive?,
and you needed to load the drivers for the harddrive so that windows CD could find it?
Allowing you to do the repair?