how to use threading for multi user to process the requests

Question

Hi,

I have a code snippet, which is kept inside the timer control.
Steps
1. This timer will hit the database every 2 seconds and get the records which the status is false.
2. Pause the timer to process the top 1 record.
3. After getting the records, take the top 1 record and processes functionality.
4. Start the timer after processing the top 1 record.

The above code working well for record by record.

Now I want to enhance this code to process the records parallel processing, like if multiple users submitted the request then my code should process every users request at a time.

Please tell me some suggestions to achieve the new functionality.

The above code is used in the Windows service and installed in the server.

Thanks