Repair Windows
To repair Windows and fix ATT-ERR-001, you need to run a series of commands in Command Prompt with administrator privileges.Step-by-Step Instructions
-
Open Command Prompt as Administrator
- Click the
Startbutton or press theWindowskey. - Type
cmdin the search bar. - Right-click on
Command Promptfrom the search results and selectRun as administrator.
- Click the
-
Run System File Checker (SFC)
- In the Command Prompt window, type the following command and press
Enter:
- Wait for the scan to complete. This process may take some time.
- In the Command Prompt window, type the following command and press
The System File Checker will scan and repair corrupted system files. Please be patient and wait until the process is complete.
-
Run Deployment Imaging Service and Management Tool (DISM) Commands
- After the SFC scan completes, run the following DISM commands one by one. Make sure to wait for each command to finish before running the next one.
- This command checks for corruption in the Windows image.
- This command scans the Windows image for any corruption.
- This command repairs the Windows image.
Summary of Commands
-
System File Checker (SFC):
-
DISM Commands:
Additional Steps (If Needed)
If the error persists after running the above commands, consider the following additional steps:Update Windows
- Check for Updates
- Open
Settings>Update & Security>Windows Update. - Click
Check for updatesand install any available updates. - Restart your computer if prompted.
- Open
Perform a Clean Boot
- Clean Boot
- Perform a clean boot to eliminate software conflicts by following the instructions here.
Reset Windows Components
-
Reset Windows Components
- Open Command Prompt as administrator and run the following commands to reset Windows Update components:
Renaming the SoftwareDistribution and catroot2 folders forces Windows to create new ones, which can resolve update issues.