Windows 10: Windows USB boot Disk to boot into actual damaged windows!?

First of all I am sorry if this question has been asked and if there is already an answer available, but I could not find it.
Also sorry if what I am asking comes out directly from my imagination and for whatever reason not possible to achieve.

But it's still worth asking as if possible it would be a life saver for me!

I want to know if there is any bootdisk (available or possible to create) that will allow me to boot into my actual damaged
windows? I already have boot disks with PE windows environment which will boot the PC, but it's like if I boot with another
windows and have access to my C: (the damaged windows I want to repair) only as a drive and not as a loaded OS.

What I would like is to use the bootable USB and boot into the damaged windows. So if I open regedit and modify something
it's modified on the damage OS or be able to open device manager and remove something in the damaged OS.

:)

 

Installing windows off of a USB stick

Step By Step from vista:
From admin cmd prompt

1. diskpart
1a. list disk
2. select disk 1 (replace 1 with your usb drive)
3. clean
4. create partition primary
5. select partition 1 (replace 1 with your usb drive)
6. active
7. format fs=fat32
8. assign
9. exit

Copy Windows Vista's DVD ROM content to the Flash Drive

xcopy d:\*.* /s/e/f e:\ (d being your vista cd and e being your usb stick)

And that's it, boot off your usb disk

 

Windows 10 USB boot

Hi there, am not a windows 10 expert. I have a pc in the bedroom on windows 10, I messed up the bootloader trying to fix the xp on that system.

System wont boot, trying to repair via win 10 usb installer.

Downloaded the media creation tool to install windows 10 installer on usb stick. Not compatible with a host of usb sticks I have. Tried the usb sticks that others use, but I think they use rufus; as the media creation tool by win 10 does not detect the usb stick.

So quick question, the win10 machine i am trying to repair the bootloader is a win7 upgraded to win10.
If i were to use the usb win10 installer to "repair installation" does the version of the iso downloaded via the media creation tool matter?

There is three options:
Windows 10
Windows 10 Home
Windows 10 N

Also is there a step by step instead of using rufus as I want to try an alternative method of creating a usb win 10 installer. Preferably with more compatibility.

System is a asus sabertooth 990 (r2?) with AMD phenom X 6.

Also is there any other software I can load onto the usb that can repair the bootloader easily?
That would be the ideal alternative. Thanks

 

Windows XP no boot

I have a no boot issue in windows XP. It just keeps giving me the "no boot device" or something similar. It will boot from the Windows XP Home disk without any issues. I have tried replacing the boot.ini, fixmbr, and fixboot. None of these have worked. I even went so far as to doing the repair by installing Windows XP Home. When it rebooted it still gave me the same reading.

I can get it to boot from a Paragon Rescue disk though. I am at a loss on this one. My next step is to run a boot virus check I suppose, as this system had over 300 trojans, virus' and malware.

This is a friends computer that has a bunch of his work related documents so I don't want to reformat or anything unless it has to.