Windows 10: Access Denied when copying to USB from CMD from failed boot Advanced Options

Windows 10 ProFails to boot and gives a recovery 'loop' where it tries, and fails, to recover.I will do a clean install to restore the PC but I want to get a key file first.I can open the CMD and can navigate to, and see, the file.I can insert a USB, and can navigate and see the drive.I can use CMD to create folders and files directly onto the USB.When I try to copy the file file I require from the c:\users\USERNAME\AppData\Local\APPNAME\ to the USB I get 'Access Denied'I have tried formating the USB, a second USB and a MicroSD card - I get the same result in all cases.Any help would be apprec

:)

 

How does Windows boot to advanced recovery option e.g. command prompt?

- that gives me a 454 'Unexpected error' This tells me that the BCD is partially corrupted.

The commands: shutdown.exe /r /o /f /t 00
or: %SystemRoot%\System32\Cmd.exe /c reagentc /boottore&shutdown /r /f /t 00
should boot into Recovery if everything is configured correctly.
FYI, If Windows is configured correctly:

1. If Reagentc is disabled, you still can get into Recovery but with limited options.
2. If Reagentc is enabled, you'll get all options.
3. If you boot Windows using Recovery USB stick, You'll get into Recovery with couple of options missing.

Here's my suggestion if you want to try:
OPTION 1: Will save the trouble of re-install Windows.

1. Download the image of my first 3 partitions (450MB Recovery, 100 MB EFI partition, and 16MB unformatted primary)
   EFI_Boot-00-00.7z - Google Drive
2. Run Macrium and restore the image from step 1, overwriting your existing 1st three partitions, leaving C alone.
3. Delete the 490MB Recovery partition.
4. From Macrium, run fix boot problems.
5. Reboot. Open Admin command prompt then run Reagentc /info to make sure that it is enabled. If not, enable it.
   if failed to enable, reboot and try again.

OPTION 2: Assuming you've already had Windows backup with Macrium.

1. Wipe out the first 5 parttiions. (450MB, 100MB, 16MB, C Drive, 480MB)
2. Fresh install Windows 10
3. Restore C drive from backup image, run fix boot problems
4. repeat step 5 from OPTION 1 above.

 

Critical Service Failed - Automatic Repair and Advanced Options

Update:
Tried the Repair disk. Still back to "Your pc ran into a problem", "Preparing automatic repair" followed by Advanced Options which have been tried again.

Would anyone recommend:

• bootrec.exe /rebuildbcd
• bootrec.exe /fixmbr
• bootrec.exe /fixboot

Otherwise, I have a bootable Win PE file waiting to be burned on to USB key, as suggested by other Forum user, but unsure what to do with it when (or if) it boots up the laptop.

 

USB Access is denied

Thank you, I've tried the steps, now I've got it working for the first 1 minute after the boot-up and after the minute it goes back to access denied error. When I tried to check for the security tab on the properties of the USB when connected it didn't
have the security tab and instead it had 'ReadyBoost'. Can this be the problem?