How do I get a repair disc to repair windows?
You'll need the install media and of course another working computer that you can use to acquire it....
The installation media can be obtained through either of these two resources.
https://www.microsoft.com/en-us/software-download/techbench
OR
http://www.microsoft.com/en-us/software-download/windows10
Be sure to acquire the proper version and bit architecture for your computer.
Once you have the ISO, you can use ImgBurn to burn it to a DVD or Rufus to burn it to a USB ThumbDrive, either of which you can use to boot your computer.
When you've managed to boot from the installation media you need to click the Repair Your PC link on the second page after the Choose a Language and Keyboard layout page.
That should get you to the Advanced Troubleshooting options.
From there you could try
1. Startup Settings to see if you can boot into Safe Mode. If so this might indicate a driver or third party software program or service that is causing the issue.
2. Startup Repair might fix some startup file problems
3. System Restore to an earlier point in time
OR even
4. Go back to...... depending on what might be available there (previous version of Windows or previous build)
Be aware that, that error message might suggest a physical problem with your system's hardware.
1, The physical disk (hard drive). If you have a means to remove the physical drive and attach it to another computer (USB docking station or cables designed for just such a purpose or as an internal slave drive / secondary physical drive) you might be able to run the native Check Disk utility to inspect the drive for errors.
2. Bad physical memory (RAM) you could use Memtest 86+ to boot the system and run 6 passes or overnight to see if it produces any errors
http://www.memtest.org/
OR
3. Just a bad install that resulted in insurmountable Operating System file corruption in which case you may have to re-install, but....
Re-installing on a system with a bad hard drive or bad physical memory is not likely to produce any better results.