This message appears when the software is already using the serial number and activation key that you're entering.

Delete the sage.usr file and ensure you enter the correct serial number and activation key.

To delete the sage.usr file:

1. Close Sage 50 Accounts.
2. Hold down the Windows Key and press E to open File Explorer.
3. Browse to C:\ProgramData\Sage\Accounts\XXXX. Where XXXX is your software version, for example, 2026 for v32.
4. Right-click the sage.usr file and select Delete.
5. Close the File Explorer window.
6. Reopen Sage 50 Accounts and enter the correct serial number and activation key when prompted.

This message appears when you enter the wrong serial number or activation key.

If the details are correct, the file that contains the registration details, the sage.usr can be corrupt. 

Delete the sage.usr file:

1. Close Sage 50 Accounts.
2. Hold down the Windows Key and press E to open File Explorer.
3. Browse to C:\ProgramData\Sage\Accounts\XXXX. Where XXXX is your software version, for example, 2026 for v32.
4. Right-click the sage.usr file and select Delete.
5. Close the File Explorer window.
6. Reopen Sage 50 Accounts and enter the correct serial number and activation key when prompted.

This message appears when you don’t have the required Windows permissions to update the sage.usr file. To correct this message, you must have Modify permissions allowed on the folder that contains the sage.usr file.

1. Close Sage 50 Accounts.
2. Hold down the Windows Key and press E to open File Explorer.
3. Browse to C:\ProgramData\Sage\Accounts\XXXX. Where XXXX is your software version, for example, 2026 for v32.
4. Right-click the sage.usr file and select Properties.
5. Select the Security tab and ensure the Modify option shows in the Allow column. For support with editing this, contact your local IT support.
6. Close all windows and reopen Sage 50 Accounts.
7. You can now enter the correct serial number and activation key.

This message appears when the sage.usr file shows as read only or when you don’t have the required Windows permissions to update the file.  

1. Close Sage 50 Accounts.
2. Hold down the Windows Key and press E to open File Explorer.
3. Browse to C:\ProgramData\Sage\Accounts\XXXX. Where XXXX is your software version, for example, 2026 for v32.
4. Right-click the sage.usr file and select Properties.
5. Check the Read-only checkbox. 
6. Select the Security tab and ensure the Modify option shows in the Allow column. For support with editing these options, contact your local IT support.
7. Close all windows and reopen Sage 50 Accounts.
8. You can now enter the correct serial number and activation key.
9. If the problem persists, delete the sage.usr file and then open Sage 50 Accounts again.