Win7 won't start - it loops on the repair option of the install DVD

Error code0x80070570
"The file or directory D:\windows\winsxs please run chkdsk utility"

Computer has taken over and is running repair, found an issue with D: (wasnt quick enough to get words)and starting windows again.

Still won't start properly. This time there was a blue screen 'crash dump' which quickly disappeared. And the consequent 'cant start' message. I have to give up for now and will have another go tomorrow. One interesting sighting was during a repair was
Disk 0 partition 1 System Reserved. 100mb 71mb System
Disk 0 partition 2 117.7gb 99.2mb(?) Primary

Thanks iko22

Okay.

The partitions might be remnants of Windows 10 install, and is probably why Windows 7 is now getting stuck.

You had told me earlier, that there are no personal data or programs on the disk, It seems best to me to delete the partitions and clean install Windows 7.

To delete the partitions, we need to know how many partitions are on the disk.

When tomorrow arrives, find all unwanted partitions and proceed to delete them. Then you are safe to clean install Windows 7.

Firstly, remove any USB stick or external disk drive that is connected to the computer.
Then, insert installation DVD into DVD drive. Boot to DVD and select CMD prompt.
From the CMD prompt, type
diskpart <Enter>
list disk <Enter>
list disk will probably list only the one disk, if it lists more than one disk, take a photo of the list, and upload this picture to the forum.
Then assuming there is only the one disk, type:
select disk 0 <Enter>
list partition <Enter>

take a picture of the list and upload image to another post in this thread. If the list shows nothing out of the ordinary, you are safe to proceed and delete all the partitions on disk 0.
To delete a particular partition, type:
select partition n <Enter>
delete partition <Enter>
list partition <Enter>

Once delete partition has been completed for all unwanted partitions, then you are clear to proceed and clean install windows 7 from the installation DVD.
Here is tutorial on how to perform a clean install of Windows 7: Clean Install Windows 7

Hope that helps!!

Attachment 407709
The attachment shows success in dealing with the 2 partitions.

I finished with trying the bcdedit process but that didn't want to work, so I am trying to install again.

Will let you know how I get on.

I've come to the end of the road. The attachments show that my HDD has failed. I suppose that has always been the problem about being unable to install Win7 successfully.

Many many thanks for ICO22 for taking the trouble to find a solution.

Yes looking at the error code, it would appear that the HDD has expired. As the computer is still good, you can still look into replacing the HDD.
I had a look at the specification of the HP nx7400, and it is stated that the HDD interface is SATA 150, meaning the maximum data transfer rate possible over the HDD connection is 1.5 Gb/s.

I was thinking of getting a SSD. Crucial Memory Ltd has.one specially for my HP nx7400.

I'm a bit puzzled how it connects within the old HDD recess. I think it comes with an adapter that connects with the internal connection strip.

Another issue is how the HP's BIOS works with an SSD. SSD is not listed so I wonder whether it accessed by the HDD selection. Perhaps the BIOS be updated. But if so, how.

By all means, you can replace your HDD with a SSD. I just wanted to add, that you might not see some of the performance benefits of the SSD because the laptop disk controller is limited to 1.5 Gb/s.

A HDD to SDD converter essentially converts a 3.5" sized SATA bay into a 2.5" sized SATA bay. However, since laptop SATA drives are already 2.5", then you do not require an adaptor for the laptop.

The BIOS will recognise the SSD as a SATA drive, and as such, a properly installed SSD will be listed where the HDD selection is.

The Operating System, when being installed, should use a generic SATA driver for the installation. When Windows 7 is up and running, then you can update this with the correct driver from the SSD manufacturer. Just check Device Manager to update the device and check for any issues.

I now have a much clearer idea of what to do. I'm much obliged ico22.