To resolve the issue of not being able to enter data manually in your application on Windows, follow these clear steps based on the relevant options available:

1. Select the Appropriate Program: Identify if you are trying to enter data in Excel, Power BI, or another application. Each program has specific methods for data entry.

2. For Excel:
- Open Excel: Launch Microsoft Excel on your device.
- Create or Open a Workbook: Start a new file or open an existing one where you want to input data.
- Select the Cell: Click on the cell where you want to enter your data.
- Type Your Data: Enter the desired data directly into the selected cell.
- Navigate: Press Enter to confirm your entry and move to the next cell. If you want to enter the same data into multiple cells, select the desired range of cells, type the data, and then press Ctrl+Enter to fill the same data across all selected cells - learn more.

3. For Power BI:
- Open Power BI Desktop: Launch the application and navigate to the Home ribbon.
- Select Enter Data: Click on the "Enter Data" option to create a new table where you can manually input your values.
- Input Your Data: Fill in the fields provided in the prompted data entry window.
- Save and Close: Once your data is entered, save your changes to make sure they are stored correctly - learn more.

4. For Other Applications: Check each application's manual or help section as different software may have unique interfaces or shortcuts for data entry.

5. Device or Software Issues: If you find that your keyboard is not responding, check for issues such as:
- Keyboard connectivity (for external keyboards).
- Updates that need to be installed for your application or operating system.
- Restart the application or your device, as this can often resolve temporary glitches.

6. Help from Community Forums: If issues persist, consult community forums related to your application for specific user experiences and solutions - learn more.

Following these steps should help you successfully enter data manually in your selected program. If you've followed these steps and still face issues, consider reaching out to technical support for the application you are using.