In each user profile there is a file named NTUSER.DAT. This file contains the settings and preferences for each user. You should not delete it or probably modify it. Windows automatically loads, edits, and saves the file for you.
NTUSER.DAT contains your user profile settings
Whenever you change the appearance and behavior of Windows and installed programs, whether it's the desktop background, the monitor resolution, or even the default printer, Windows should remember your preferences the next time you load.
Windows achieves this by first storing this information in the Registry in the HKEY_CURRENT_USER hive. Then, when you log out or shut down, Windows saves this information to the NTUSER.DAT file. The next time you log in, Windows will load NTUSER.DAT into memory and all of your preferences will load into the Registry again. This process allows you to define personal settings unique to your user profile, such as your desktop background.
The name NTUSER.DAT is a maintenance of Windows NT, introduced for the first time with Windows 3.1. Microsoft uses the DAT extension with any file containing data.
Each user has an NTUSER.DAT file
Windows has not always taken care of this.completely harassing user profiles. In the first versions when you started Windows, each computer user saw the same desktop, the same files, and the same programs. Windows now better supports multiple users on the same machine, and it does this by placing an NTUSER.DAT file in each user's profile. You can access it by opening File Explorer and navigating to:
C: Users * YourUserName *
or by typing:
in the address bar of File Explorer, then press Enter.
If you don't see NTUSER.DAT yet, don't worry. Microsoft doesn't intend to change or delete this file to hide it. You can enable the Show Hidden Files option to make the file visible.
You'll probably notice that in addition to n an NTUSER.DAT file, there are also one or more ntuser.dat.LOG files. Each time you make a change, Windows saves your new preferences in the NTUSER.DAT file. But first, it performs a copy and rename it to ntuser.dat.LOG (plus an incremented number) to save your previous settings. Even Microsoft knows that you should always back up your settings and files .
Do not delete the NTUSER.DAT file
You should never deleteoverride your NTUSER.DAT file. Because Windows depends on it to load your settings and preferences, deleting it would corrupt your user profile. The next time you log in, you will see a prompt saying that Windows cannot connect to your account.
Despite the suggestion that disconnecting and then reconnecting may solve the problem, you '' I see the same message again. If you try to create an ordinary NTUSER.DAT file forr replace the missing instance, you will encounter a loop during the first installation dialog and Windows will never terminate the connection.
The NTUSER.DAT file is generally not a large file, between 3 megabytes on one of our new computers and 17 megabytes on a PC that we have been using for a few years. Deleting it usually doesn't save a lot of space, but the results can be disastrous.x. If a user profile is not required, it is best to delete the user account via Windows.
You probably shouldn't change it either. Some administrators can do this to make quick changes to many users, but if you're not careful, you can cause problems that are hard to fix.
The best thing to do is use regedit to make changes to the registry. Working with the registry is also something you need to do with caution, but chances are you can find a guide who will walk you through the necessary steps. After you have modified the registry the next time you log out or when you close your new settings, they will be saved to the NTUSER.DAT file.