Resolve Frequent WiFi Connectivity Problem

I'm having consistent issues with my WiFi connectivity. The connection is dropping frequently and without any discernible pattern. It's particularly affecting my desktop computer, which I largely depend on for work and leisure. I need an experienced technician who can reliably resolve this issue, with specialization in network troubleshooting, wireless network setup & repair, and desktop support. The successful freelancer will need to:
- Diagnose the cause of the inconsistent connectivity
- Recommend and implement a solution to fix the issue
- Ensure a stable and robust Wi-Fi connection, particularly for my desktop.