I need to set the proper permission for this action
Your new Windows Admin account has a different SSID to the old Windows Admin account.
You need to take ownership of the files/directories on the hard drive.
Note:
- Do not take ownership of
C:\. Doing so, could result in Windows becoming very unstable.
Take Ownership of an Object using TAKEOWN Command
This command will take ownership of the folder or drive, and all files and subfolders in the folder or drive.
Open an elevated command prompt.
To grant ownership to currently logged on user:
takeown /F "full path of folder or drive" /R /D Y
To grant ownership to the administrators group:
takeown /F "full path of folder or drive" /A /R /D Y
Example:
takeown /F "C:\windows.old" /A /R /D Y
Take Ownership of a Folder or Drive and All Contents using ICALCS Command
Open an elevated command prompt.
To set any user as owner:
icacls "full path of folder or drive" /setowner "user name" /T /C
To set administrators group as owner:
icacls "full path of folder or drive" /setowner "Administrators" /T /C
Example:
icacls "C:\windows.old" /setowner "Administrators" /T /C
Source Take Ownership of a File, Folder, Drive, or Registry Key in Windows 8
The setup file for Windows 10 Anniversary Update is in 'C:/Windows10Upgrade' as an ESD file format. While downloading the update through the tool, it keeps on saving the downloaded materials in the ESD file. So, don't worry if you had to cancel the download in between. It will always resume even after you cancel the download in the tool. If you are quite apprehensive of this then you can COPY the 'Windows10Upgrade' folder in an external storage device as a backup. When you start the download again, I'm sure it will resume again. But if it doesn't then you can paste the backed up folder in the C: and then the download will resume.
After you install the Update the ESD install file is usually treated as a temporary file by Windows. So, it deletes to allow more space. If you want to keep a backup then you should keep it before installing the updates.
Best Answer
First a warning :
Windows.oldis almost totally deleted after 28 days, so better hurry if you wish to recover any data.This folder is created during a major upgrade of Windows, and allows the rollback to the previous version of Windows.
Here is what Microsoft says :
In particular, you will find :
C:\Windows.old\System32\configC:\Windows.old\System32\Users, which includes Cookies, Start Menu, UserData and more.For more information see the Microsoft article :
Recover personal files from the Windows.old Folder such as Documents Pictures and Windows Live Mail Emails in Windows 10