System file permissions

Hi, I'm trying to replace some files that have been flagged up as damaged by System File Checker. It can't repair the files as it reports the files in the store are also damaged. I have two almost identical desktop PCs both running Windows 7 Professional SP1. SFC has found damaged files on both but as they are different files I reasoned it should be possible to replace the damaged files with good copies from the other machine.

I've run across a problem in that when I try to copy a file onto the destination machine it reports I don't have permission. This is in spite of the fact my user accounts have Administrator privileges on both machines. It won't let me change the file permissions.

I'd be most grateful for any suggestions on how to overcome this problem.

I was trying to do the repair as suggested in this Microsoft article but having looked at it again I think you're right. It's far too complicated, especially trying to type in the long folder names without errors and too much risk of bricking something.

An in-place repair install reinstalls Windows while keeping all your installed programs and user files. For Windows 7 it is the safest way to repair your installed Windows.

@Bree

I seem to remember you have a ga-b75m , have you tried this? It is easy because it just needs the bios update
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booting nvme disk via pcie adapter on older machines

Bree, thanks for that link. I'd found a similar guide from PC World but this has useful additional information.

SIW2, I have a GA-P61-USB3-B3. I'm not familiar with NVME. I've just looked it up on Wikipedia but can't see the relevance to what I'm going to be doing.

I should say at this point that the main reason for wanting to get this repair done is I'm hoping it might solve the problems I've been having that I described in this post.

Edit: Whilst looking through Networks again I've stumbled across the reason for the problem detailed in that post. It appears some software I'd installed that came with a Canon camera had set up another network for the camera. In some way (that I don't pretend to understand) this network seems to have been given greater priority over the home network. Having removed that network everything seems to be back to normal so the impetus to do a repair install is reduced.

Spoke too soon. Turned the laptop on this morning and couldn't see it from the PC. Ping reports it as unreachable. Ping on the laptop also reports the PC as unreachable. Network diagnostics on both machines say the computer is correctly configured but the other one is not responding.

The only thing that's changed, as far as I know, is another Tuesday update on the Windows 10 laptop. Could that have screwed something?

Also, am I right in thinking Windows 10 doesn't support Homegroups? Is that likely to have any bearing on the problem?

The odd thing is this has only turned up in the last few months. For nearly 3 years since I bought the laptop it's all been working fine.