Okay to give a bit of context, I have recently installed a new motherboard, CPU, and RAM which I was able to get working after a few troubles. The computer booted, made lots of changes to the system (finding 'new' devices etc) and told me to restart.
This I did but may have caused my own problem. What I was also doing was cloning my current WD 160GB HDD boot drive to a new Seagate 3TB boot drive, so instead of booting back into windows (7 Pro) I used the Seagate clone program, can't remember what it's called, to successfully clone the drive.
Since that point, the computer won't start regardless of which drive I'm trying to use as the boot, and yes I've tried both in at the same time, just one, then just the other - no different. Booting from the Windows 7 Pro disc tells me that the the operating system is 'Unknown' for both drives, yet when I've been able to use the boot DVD to explore the file structure, it looks like all of the files are fine.
The error I keep getting is that the partition is wrong or corrupt - if I try to boot from either disc it immediately goes to a blue screen (which I can't read as it only appears VERY quickly) and restarts. I've had a similar problem in the past which I was able to fix after about three days but I'm getting really frustrated and don't want to break anything!
rgd1101 - I've tried many times. It tells me that on the new drive there is no valid Windows install to fix, which is just great. On the old one it says that it can find Windows, but there's a partition error and it will fix it, yet the fix never works. I've also tried System Restore which also achieves nothing.
fzabkar - yeah I know, which was the driving reason for the new motherboard/CPU/RAM. The board does have UEFI and yes the new drive was GPT. The old drive is MBR. DiscWizard told me that it was best to use the 'automatic' option so that's what I did, I imagine that it expanded the partitions but I'm not entirely sure. I also don't understand why that would make my original drive corrupt.
I haven't tried the programs you suggest just yet, but will and report what happens.
Okay this is odd. I have a spare boot drive from another computer and tried to boot my comp from that drive instead - I got the exact same blue screen error that I got from my original boot drive, even though I know the spare boot drive is fine. What is going on?
What is going on is that you are trying to boot windows from a drive which is setup for a different Motherboard. Even when this works the result is often unstable, esp with windows 7. Your best bet is to do a Clean install of windows to the new drive and then copy your data from the old drive.
Okay I'm stumped. I have to install Windows 7 using UEFI so that I can installk it on my 3TB, but my system isn't giving me tthe option of booting with UEFI from the disc, only normal BIOS, and I have no idea how to get around it. I've tried this guide (http://www.sevenforums.com/tutorials/186875-uefi-unifie...) but I can't figure out how I'm supposed to force the system to use UEFI, as in where to input that command prompt stuff. I tried on the Windows 7 intro screen from the boot disc, but it tells me it doesn't know how to open the file.